FCC ID: XRAFB421 Wireless Activity Tracker

Model FB421

User Manual Table of Contents Table of Contents ......................................................................................................... 3 Get started ....................................................................................................................... 7 What's in the box .................................................................................. 7 Set up FB421 ................................................................................................................... 8 Charge your tracker .............................................................................. 8 Set up with your phone or tablet ........................................................... 8 See your data in the Fitbit app ............................................................... 9 Unlock Fitbit Premium ............................................................................................. 10 Wear FB421 ................................................................................................................... 11 Placement for all-day wear vs. exercise ............................................... 11 Handedness ........................................................................................ 11 Change the band ........................................................................................................ 12 Remove a band ................................................................................... 12 Attach a new band .............................................................................. 12 Basics .............................................................................................................................. 13 Navigate FB421 ................................................................................... 13 Basic navigation ............................................................................... 13 Quick settings ................................................................................. 13 Adjust settings .................................................................................... 15 Check battery level .............................................................................. 16 Turn off the screen .............................................................................. 16 Care for FB421 .................................................................................... 16 Apps and Clock Faces .............................................................................................. 17 Change the clock face ......................................................................... 17 Open apps .......................................................................................... 17 Download additional apps ................................................................... 17 Remove apps ....................................................................................... 17 Lifestyle ......................................................................................................................... 18 Notifications ................................................................................................................ 19 Set up notifications ............................................................................. 19 See incoming notifications .................................................................. 19 3 Manage notifications ........................................................................... 20 Turn off notifications .......................................................................... 20 Answer or reject phone calls ............................................................... 20 Respond to messages .......................................................................... 21 Timekeeping ................................................................................................................ 22 Use the Alarms app ............................................................................. 22 Dismiss or snooze an alarm ............................................................. 22 Use the Timers app ............................................................................. 22 Activity and Sleep ...................................................................................................... 23 See your stats ...................................................................................... 23 Track a daily activity goal .................................................................... 24 Choose a goal .................................................................................. 24 Track your hourly activity .................................................................... 24 Track your sleep .................................................................................. 24 Set a sleep goal ............................................................................... 24 Learn about your sleep habits .......................................................... 25 See your heart rate .............................................................................. 25 Get high or low heart rate notifications ............................................... 25 Track blood oxygenation saturation (SpO2) ......................................... 25 Manage stress with EDA Scan app ....................................................... 26 Fitness and Exercise ................................................................................................. 27 Track your exercise automatically ....................................................... 27 Track and analyze exercise with the Exercise app ................................ 27 Track an exercise ............................................................................ 27 Customize your exercise settings and shortcuts .............................. 28 Check your workout summary ......................................................... 29 Check your heart rate .......................................................................... 29 Custom heart-rate zones ................................................................. 30 Earn Active Zone Minutes ................................................................. 30 Share your activity ............................................................................... 31 View your cardio fitness score ............................................................. 31 Update, Restart, and Erase .................................................................................... 32 Update FB421 ...................................................................................... 32 Restart FB421 ...................................................................................... 32 Erase FB421 ........................................................................................ 33 Troubleshooting ........................................................................................................ 34 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Heart-rate signal missing .................................................................... 34 Other issues ........................................................................................ 34 General Info and Specifications .......................................................................... 35 Sensors ............................................................................................... 35 Materials ............................................................................................. 35 Wireless technology ............................................................................ 35 Haptic feedback .................................................................................. 35 Battery ................................................................................................ 35 Memory ............................................................................................... 35 Display ................................................................................................ 35 Band size ............................................................................................ 36 Environmental conditions .................................................................... 36 Learn more .......................................................................................... 36 Return policy and warranty .................................................................. 36 Regulatory & Safety Notices ................................................................................. 38 USA: Federal Communications Commission (FCC) statement ............... 38 Canada: Industry Canada (IC) statement .............................................. 39 European Union (EU) ............................................................................ 40 Argentina ............................................................................................ 41 Australia and New Zealand .................................................................. 41 Belarus ................................................................................................ 41 Botswana ............................................................................................ 42 Customs Union .................................................................................... 42 Indonesia ............................................................................................ 42 Israel ................................................................................................... 42 Japan .................................................................................................. 42 Kingdom of Saudi Arabia ..................................................................... 43 Mexico ................................................................................................ 43 Morocco .............................................................................................. 43 Nigeria ................................................................................................ 44 Oman .................................................................................................. 44 Pakistan .............................................................................................. 44 Philippines .......................................................................................... 44 Serbia .................................................................................................. 45 Singapore ............................................................................................ 45 South Korea ........................................................................................ 45 Taiwan ................................................................................................ 46 United Arab Emirates ........................................................................... 48 United Kingdom .................................................................................. 49 5 Vietnam .............................................................................................. 49 Zambia ................................................................................................ 49 About the Battery ................................................................................ 50 IP Rating ............................................................................................. 50 Safety Statement ................................................................................. 50 Regulatory Markings ........................................................................... 50 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Get started What's in the box Your FB421box includes:

Push your goals further with built-in GPS, personalized heart-rate features, up to 7 days of battery life, and more on Fitbit FB421. Take a moment to review our complete safety information at fitbit.com/safety. FB421 is not intended to provide medical or scientific data. Tracker with small band

(color and material vary) Charging cable Additional large band (color and material vary) The detachable bands on FB421 come in a variety of colors and materials, sold separately. 7 Set up FB421 For the best experience, use the Fitbit app for iPhones and iPads or Android phones. To create a Fitbit account, you're prompted to enter your birthdate, height, weight, and sex to calculate your stride length and to estimate distance, basal metabolic rate, and calorie burn. After you set up your account, your first name, last initial, and profile picture are visible to all other Fitbit users. You have the option to share other information, but most of the information you provide to create an account is private by default. Charge your tracker A fully-charged FB421 has a battery life of up to 7 days. Battery life and charge cycles vary with use and other factors; actual results will vary. Note: The FB421 charging cable has a black magnetic connector on the device side, and a button on the USB side . The Charge 4 charger doesnt work with FB421. To charge FB421:

1. Plug the charging cable into the USB port on your computer, or a UL-certified USB wall charger, or another low-energy charging device. 2. Attach the other end of the charging cable to the back of FB421. The pins on the charging clip must lock securely with the gold contacts on the back of the tracker. FB421 vibrates, and a battery icon appears on the screen. If the screen remains blank after attaching the charger to the device, detach and reattach the charger to the device. Charging fully takes about 1-2 hours. While the tracker charges, you can tap on the screen to check the battery level. Set up with your phone or tablet Set up FB421 with the Fitbit app. The Fitbit app is compatible with most popular phones and tablets. For more information, see fitbit.com/devices. To get started:

1. If you have an Android device you may see a pop-up asking you to install or open the Fitbit app. If you dont see the pop-up or have an iOS device, see the following instructions. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. 2. Download the Fitbit app:

Apple App Store for iPhones and iPads Google Play Store for Android phones 2. Install the app, and open it. If you already have a Fitbit account, log in to your account > tap the Today

> your profile picture > Set Up a Device. tab If you don't have a Fitbit account, tap Join Fitbit to be guided through a series of questions to create a Fitbit account. 3. Continue to follow the on-screen instructions to connect FB421 to your account. When you're done with setup, read through the guide to learn more about your new tracker and then explore the Fitbit app. For more information, see help.fitbit.com. See your data in the Fitbit app Sync FB421 to transfer your data to the Fitbit app, where you can view your activity and sleep data, log food and water, participate in challenges, and more. Each time you open the Fitbit app, FB421 syncs automatically when it's nearby. You can also use the Sync Now option in the app at any time. 9 Unlock Fitbit Premium Fitbit Premium helps you build healthy habits by offering tailored workouts, insights into how your behavior impacts your health, and personalized plans to help you reach your goals. A Fitbit Premium subscription includes health insights and guidance, advanced sleep tools, customized programs, and 150+ workouts from fitness brands. For more information, see help.fitbit.com. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Wear FB421 Place FB421 around your wrist. If you need to attach a different size band, or if you purchased another band, see the instructions in "Change the band" on page 12. Placement for all-day wear vs. exercise When you're not exercising, wear FB421 a finger's width above your wrist bone. For optimized heart-rate tracking while exercising:

During a workout, experiment with wearing your tracker higher on your wrist (2 finger widths) for an improved fit. Many exercises, such as bike riding or weight lifting, cause you to bend your wrist frequently, which could interfere with the heart-rate signal if the tracker is lower on your wrist. Wear your tracker on top of your wrist, and make sure the back of the device is in contact with your skin. Consider tightening your band before a workout and loosening it when youre done. The band should be snug but not constricting (a tight band restricts blood flow, potentially affecting the heart-rate signal). Handedness For greater accuracy, you must specify whether you wear FB421 on your dominant or non-dominant hand. Your dominant hand is the one you use for writing and eating. To start, the Wrist setting is set to non-dominant. If you wear FB421 on your dominant hand, change the Wrist setting in the Fitbit app:

From the Today tab

> Dominant. in the Fitbit app, tap your profile picture > FB421 tile > Wrist 11 Change the band FB421 comes with a small band attached and an additional large, bottom band in the box. Both the top and bottom bands can be swapped with accessory bands, sold separately on fitbit.com. For band measurements, see "Band size" on page 36. Charge 4bands are not compatible with FB421. Remove a band 1. Turn over FB421 and find the band latches. 2. To release the latch, press the latch outward toward the band. 3. Gently pull the band away from the tracker to release it. 4. Repeat on the other side. Attach a new band To attach a new band, press it into the end of the tracker until you feel it snap into place and see the latch close into the locked position against the device body. If you have trouble attaching the band or if it feels loose, gently move the band back and forth to make sure it's attached to the tracker. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Basics Learn how to manage FB421's settings, set a personal PIN code, navigate the screen, and more. Navigate FB421 FB421 has a AMOLED touchscreen display. Navigate FB421 by tapping the screen or swiping side to side and up and down. To preserve battery, the trackers screen turns off when not in use. Turning your wrist to face you or tapping on the display will turn the display back on. Basic navigation The home screen is the clock. Swipe down to see the quick settings menu and the access the main settings Swipe up to see day, date, battery level and your daily stats. Swipe left or right to see the apps on your tracker or to go back to a previous screen or return to the clock face. menu. Quick settings Swipe down on FB421 for a faster way to access certain settings. Tap a setting to turn it on or off. When you turn off the setting, the icon appears dim with a line through it. On the quick settings screen:

DND (Do not disturb) When the do not disturb setting is on, notifications, goal celebrations, and reminders to move don't cause the tracker to vibrate or the screen to turn on. You can't turn on do not disturb and sleep mode at the same time. 13 Sleep Mode When the sleep mode setting is on:

Notifications don't cause the tracker to vibrate or the screen to turn on. The screen's brightness is set to dim. Turning your wrist won't cause the tracker's screen to turn on. Sleep mode doesn't automatically turn off unless you set a sleep mode schedule. To schedule sleep mode to automatically turn on during certain hours:

1. Open the Settings app 2. Tap Schedule to turn it on. 3. Tap Sleep Interval and set your sleep mode and tap Sleep Mode. schedule. Sleep mode automatically turns off at the time you schedule, even if you manually turned it on. You can't turn on do not disturb and sleep mode at the same time. Screen Wake When the screen wake setting is on Auto, turn your wrist toward you to turn on the screen. When screen wake is set to Manual, you must tap the screen to wake the display. Brightness Allows you to set the Brightness to Low, Medium, High and Auto. In the Auto, and ambient light sensor will adjust display brightness automatically 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Water Lock Settings Locks the touchscreen manually to avoid false activation when taking a shower or exercising in wet environments Takes you to the full set of device settings including the ability to restart the device or erase user data. Adjust settings Manage basic settings in the Settings app

Display Brightness - Change the screen's brightness. Settings Screen Wake Switch between automatic with wrist flip or manual using a tap Screen Time Out Adjust the screen time out (impacts battery life) Quiet Do Not Disturb Turn off all notifications Modes Sleep Mode Dim screen, switch to manual screen wake and turn of notifications. Set a schedule for Sleep Mode to turn on and off Exercise Focus Turn off notifications except HR zone notifications Heart Rate Turn heart-rate tracking on or off. Heart Zone Turn on or off the heart zone alerts you receive during everyday activity. For Alerts more information, see help.fitbit.com. Vibrations Adjust your tracker's vibration strength. GPS Choose between dynamic or built-in GPS, and turn Glonass and Low Power Device Info Show regulatory information and provision for restarting the device or clearing Mode on and off user data Restart Restart the device if you are experiencing device issues or cannot sync with Device the app 15 Check battery level Turn off the screen Care for FB421 Tap a setting to adjust it. Swipe up to see the full list of settings. On the clock face, swipe up. The battery level icon is at the top of the screen. To turn off FB421's screen when not in use, briefly cover the tracker face with your opposite hand, press the button, or turn your wrist away from your body. It's important to clean and dry FB421 regularly. FB241 has shiny metal finishes; to avoid scratches keep the device housing from direct contact with metal or hard rough surfaces. For more information, see fitbit.com/productcare. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Apps and Clock Faces Change the clock face The Fitbit App Gallery and Clock Gallery offer apps and clock faces to personalize your tracker and meet a variety of health, fitness, timekeeping, and everyday needs. 1. From the Today tab 2. Tap Clock Faces > All Clocks. 3. Browse the available clock faces. Tap a clock face to see a detailed view. 4. Tap Select to add the clock face to FB421. in the Fitbit app, tap your profile picture > FB421 tile. Open apps From the clock face, swipe left to see the apps installed on your tracker. To open an app, tap it. Download additional apps 1. From the Today tab 2. Tap Apps > All Apps. 3. Browse the available apps. When you find one you want to install, tap it. 4. Tap Install to add the app to FB421. in the Fitbit app, tap your profile picture > FB421 tile. For more information, see help.fitbit.com. Remove apps You can remove most apps installed on FB421:

in the Fitbit app, tap your profile picture > FB421 tile. In the My Apps tab, find the app you want to remove. You may have to swipe up to find it. 1. From the Today tab 2. Tap Apps. 3. 4. Tap the app > Remove. 17 Lifestyle Use apps to stay connected to what you care about most. See "Apps and Clock Faces"

on page 17 for instructions on how to add and delete apps. For more information, see help.fitbit.com. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Notifications Set up notifications FB421 can show call, text, calendar, and app notifications from your phone to keep you informed. Keep your tracker within 30 feet of your phone to receive notifications. Check that Bluetooth on your phone is on and that your phone can receive notifications

(often under Settings > Notifications). Then set up notifications:

1. From the Today tab 2. Tap Notifications. 3. Follow the on-screen instructions to pair your tracker if you haven't already. Call, in the Fitbit app, tap your profile picture > FB421 tile. text, and calendar notifications are turned on automatically. 4. To turn on notifications from apps installed on your phone, including Fitbit and WhatsApp, tap App Notifications and turn on the notifications you want to see. Note that if you have an iPhone or iPad, FB421 shows notifications from all calendars synced to the Calendar app. If you have an Android phone, FB421 shows calendar notifications from the calendar app you choose during setup. For more information, see help.fitbit.com. See incoming notifications A notification causes your tracker to vibrate. If you don't read the notification when it arrives, you can check it later by swiping down from the top of the screen. 19 Manage notifications To manage notifications:

FB421 stores up to 10 notifications, after which the oldest are replaced as you receive new ones. Open the Notifications app to see your notifications and tap any notification to To delete a notification, tap to expand it, then swipe to the bottom and tap Clear. To delete all notifications at once, swipe to the top of your notifications and tap expand it. Clear All. Turn off notifications Turn off certain notifications in the Fitbit app, or turn off all notifications in the quick settings on FB421. When all notifications are turned off, your tracker won't vibrate and the screen won't turn on when your phone receives a notification. To turn off certain notifications:

1. From the Today tab in the Fitbit app on your phone, tap your profile picture

> FB421 tile > Notifications. 2. Turn off the notifications you no longer want to receive on your tracker. 3. Sync your tracker to save your changes. To turn off all notifications:

1. Press and hold the button on your tracker and swipe left to reach the quick settings screen. 2. Tap DND to turn on do not disturb. The DND icon dims to indicate that all notifications, including goal celebrations and reminders to move, are turned off. Note that if you use the do not disturb setting on your phone, you don't receive notifications on your tracker until you turn off this setting. Answer or reject phone calls If paired to an iPhone or Android (8.0+) phone, FB421 lets you accept or reject incoming phone calls. If your phone is running an older version of the Android OS, you can reject, but not accept, calls on your tracker. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. To accept a call, tap the check mark speak into the trackeraccepting a phone call answers the call on your nearby phone. on your tracker's screen. Note that you can't To reject a call, tap the icon on your tracker's screen. The caller's name appears if that person is in your contacts list; otherwise you see a phone number. Respond to messages Respond directly to text messages and notifications from select apps on your tracker with preset quick replies. This feature is currently available on devices paired to an Android phone. Keep your phone nearby with the Fitbit app running in the background to respond to messages from your tracker. To respond to a message:

the clock face. 1. Tap the notification on your tracker. To see recent messages, swipe down from 2. Tap Reply. If you dont see an option to reply to the message, replies arent available for the app that sent the notification. 3. Choose a text reply from the list of quick replies or tap the emoji icon to choose an emoji. For more information, including how to customize quick replies, see help.fitbit.com. 21 Timekeeping Use the Alarms app Alarms vibrate to wake or alert you at a time you set. Set up to 8 alarms to occur once or on multiple days of the week. You can also time events with the stopwatch or set a countdown timer. Set one-time or recurring alarms with the Alarms app your tracker vibrates. When an alarm goes off, For more information, see help.fitbit.com. Dismiss or snooze an alarm When an alarm goes off, the tracker vibrates. To snooze the alarm for 9 minutes, tap the ZZZ icon. To dismiss the alarm, press the button. Snooze the alarm as many times as you want. FB421 automatically goes into snooze mode if you ignore the alarm for more than 1 minute. Use the Timers app Time events with the stopwatch or set a countdown timer with the Timers app your tracker. You can run the stopwatch and countdown timer at the same time. on For more information, see help.fitbit.com. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Activity and Sleep FB421 continuously tracks a variety of stats whenever you wear it. Data automatically syncs when in range of the Fitbit app throughout the day. Swipe up from the clock face on your tracker to see your daily stats, including:

Steps taken today, distance covered, floors climbed, calories burned, and Active Zone Minutes Steps taken this hour, and the number of hours you met your hourly activity goal See your stats Core stats Hourly steps Heart rate Current heart rate and heart-rate zone, and resting heart rate Exercise Number of days you met your exercise goal this week Cycle track Information on the current stage of your menstrual cycle, if applicable Sleep Water Weight Duration and quality of your sleep Water intake logged today Current weight, progress toward your weight goal, or where your weight falls within a healthy range if your goal is to maintain your weight If you set a goal in the Fitbit app, a ring shows your progress toward that goal. Find your complete history and other information detected by your tracker in the Fitbit app. 23 Track a daily activity goal Choose a goal FB421 tracks your progress toward a daily activity goal of your choice. When you reach your goal, your tracker vibrates and shows a celebration. Set a goal to help you get started on your health and fitness journey. To begin, your goal is to take 10,000 steps per day. Choose to change the number of steps, or pick a different activity goal depending on your device. For more information, see help.fitbit.com. Track progress toward your goal on FB421. For more information, see "See your stats"

on page 23. Track your hourly activity FB421 helps you stay active throughout the day by keeping track of when you're stationary and reminding you to move. Reminders nudge you to walk at least 250 steps each hour. You feel a vibration and see a reminder on your screen at 10 minutes before the hour if you haven't walked 250 steps. When you meet the 250-step goal after receiving the reminder, you feel a second vibration and see a congratulatory message. For more information, see help.fitbit.com. Track your sleep Wear FB421 to bed to automatically track your time asleep, sleep stages (time spent in REM, light sleep, and deep sleep), Sleep Score (the quality of your sleep), and estimated oxygen variation (estimated changes in your blood oxygen saturation levels). To see your sleep stats, sync your tracker when you wake up and check the Fitbit app, or swipe up from the clock face on your tracker to check the sleep tile in Fitbit Today. For more information, see help.fitbit.com. Set a sleep goal To start, you have a sleep goal of 8 hours of sleep per night. Customize this goal to meet your needs. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. For more information, see help.fitbit.com. Learn about your sleep habits FB421 tracks several sleep metrics including when you go to bed, how long you're asleep, your time spent in each sleep stage, the overall quality of your sleep, and your estimated oxygen variation throughout the night. Track your sleep with FB421 and check the Fitbit app to understand how your sleep patterns compare to your peers. With a Fitbit Premium subscription, see more details about your sleep score to help you build a better sleep routine and wake up feeling refreshed. For more information, see help.fitbit.com. See your heart rate FB421 tracks your heart rate throughout the day. Swipe up from the clock face to see your real-time heart rate and your resting heart rate. For more information, see "See your stats" on page 23. Certain clock faces show your real-time heart rate on the clock screen. During a workout, FB421 shows your heart-rate zone and vibrates each time you enter a different zone to help you target the training intensity of your choice. For more information, see "Check your heart rate" on page 29. Get high or low heart rate notifications FB421 can notify you of high or low heart rate events when you are not active. To learn more and turn on these notifications, tap on the Account icon in the upper left of the Fitbit app, select FB421 and open the High & Low Heart Rate tile. Track blood oxygenation saturation (SpO2) The Fitbit SpO2 feature is intended for general wellness purposes only and should not be used or relied on for any medical purposes. Consult your health care professional about any questions or health issues you may have. This feature may not be available in all regions. 25 FB421 can measure blood oxygenation saturation while you sleep. To learn more, activate the feature and see your data, open the Health Metrics tab in the Fitbit app. Manage stress with EDA Scan app FB421 can sense changes in electrodermal activity which may indicate stress. Readings taken on the device add to the stress score seen in the Stress Management tile in the app. To take an EDA reading, swipe left or right on the device to the EDA Scan app. After finding a comfortable seated position with your wearing arm on a table or your lap, tap the app to start and hold the sides of the device using the bottom of your thumb and index finger. You can also select a session time of 2, 3 or 5 minutes and the default is 3 minutes. For more information, see "Check your heart rate" on page 29. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Fitness and Exercise Choose to automatically track exercise, or to track activity with the Exercise app and see real-time stats and a post-workout summary. Sync FB421 with the Fitbit app and share your activity with friends and family, see how your overall fitness level compares to your peers, and more. Track your exercise automatically FB421 automatically recognizes and records many high-movement activities which are at least 15 minutes long. Sync your device to see basic stats about your activity on the Exercise tile in the Fitbit app. For more information, including how to change the minimum duration before an activity is tracked, see help.fitbit.com. Track and analyze exercise with the Exercise app Track specific exercises with the Exercise app on FB421 to see real-time stats, receive heart zone notifications, and review a post-workout summary on your wrist. For additional stats and a workout intensity map if you used GPS, tap the exercise tile in the Fitbit app. For more information about tracking an exercise with GPS, see help.fitbit.com. Track an exercise 1. On FB421, open the Exercise app 2. Tap the exercise to choose it. and swipe to find an exercise. 3. Tap Start or Set Goal

. If you set an exercise goal, press the button to go back and tap Start. 4. Tap the play icon to begin. If the exercise uses GPS, you can wait for the signal to connect, or start the exercise and GPS will connect when a signal is available. Note that GPS can take a few minutes to connect. Tap the middle of the screen to scroll through your real-time stats. 5. 27 6. When you're done with your workout or want to pause, press the button. If you set a goal, your tracker vibrates and flashes when you're halfway to your goal and when you reach your goal. 7. To end the workout, press the button again and tap Finish. Swipe up to see your workout summary. Tap the check mark to close the summary screen. 8. To see your GPS data, sync your tracker and tap the Exercise tile in the Fitbit app. Notes:

stats. FB421 shows 3 real-time stats. Swipe the middle stat to see all of your real-time If the exercise uses GPS, an icon appears in the top left as your tracker connects to a GPS signal using your smartphone. When the screen says connected and FB421 vibrates, GPS is connected. For best results, make sure your phone is nearby and the Fitbit app is open on the phone. Make sure you have location services turned on. For more information, see help.fitbit.com. Customize your exercise settings and shortcuts Customize various settings for each exercise type on your tracker. Settings include:

GPS Track your route using your phones GPS Auto-Pause Automatically pause a run when you stop moving Run Detect Track runs automatically without opening the Exercise app Heart Rate Receive alerts when you hit certain heart-rate zones during your Zone Alert workout. For more information, see help.fitbit.com Pool Length Set the length of your pool Unit Change the unit of measurement you use for pool length 1. On FB421, open the Exercise app 2. Swipe through the exercises until you find the one you want to customize. 3. Swipe up, then swipe up through the list of settings. 4. Tap a setting to adjust it. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. 5. When you're done, press the button to return to the exercise screen and start your workout. To change or reorder the exercise shortcuts in the Exercise app:

1. From the Today tab 2. Tap Exercise Shortcuts. in the Fitbit app, tap your profile picture > FB421 tile. To add a new exercise shortcut, tap the + icon and select an exercise. To remove an exercise shortcut, swipe left on a shortcut. To reorder an exercise shortcut, tap Edit (iPhones only), and press and hold the hamburger icon

, then drag it up or down. Check your workout summary After you complete a workout, FB421 shows a summary of your stats. Sync your tracker, and tap the exercise tile in the Fitbit app to see additional stats and a workout intensity map if you used GPS. Check your heart rate FB421 personalizes your heart-rate zones using your heart rate reserve, which is the difference between your maximum heart rate and your resting heart rate. To help you target the training intensity of your choice, check your heart rate and heart-rate zone on your tracker during exercise. FB421 alerts you when you enter a heart-rate zone. For more information, see help.fitbit.com. Zone Calculation Description Below Zones Fat Burn Zone Below 40% of your Below the fat burn zone, your heart beats at a heart rate reserve slower pace. Youre at rest for now. Between 40% and 59%

of your heart rate reserve In the fat burn zone, youre likely in a moderate activity such as a brisk walk. Your heart rate and breathing might be elevated, but you can still carry on a conversation. 29 Cardio Zone Peak Zone Zone Calculation Description Between 60% and 84%

of your heart rate reserve In the cardio zone, youre likely doing a vigorous activity such as running or spinning. Greater than 85% of your heart rate reserve In the peak zone, youre likely doing a short, intense activity that improves performance and speed such as sprinting or high-intensity interval training. Custom heart-rate zones Instead of using these 3 heart-rate zones, you can create a custom zone to target a specific heart-rate range in the Fitbit app. For more information, see help.fitbit.com. Earn Active Zone Minutes Earn Active Zone Minutes for time spent in the fat burn, cardio, or peak heart-rate zones. To help you maximize your time, you earn 2 Active Zone Minutes for each minute youre in the cardio or peak zones. Heart-rate zones are personalized based on your fitness level and age. 1 minute in the fat burn zone = 1 Active Zone Minute 1 minute in the cardio or peak zones = 2 Active Zone Minutes There are 2 ways FB421 alerts you about Active Zone Minutes:

A few moments after you enter a different heart-rate zone in the Exercise app

, so that you know how hard youre working. The number of times your device vibrates indicates which zone youre in:

1 buzz = fat burn zone 2 buzzes = cardio zone 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. 7 minutes after you enter a heart-rate zone throughout the day (for example, 3 buzzes = peak zone during a brisk walk) For more information, see help.fitbit.com. Share your activity For more information, see help.fitbit.com. View your cardio fitness score After you complete a workout, sync your tracker with the Fitbit app to share your stats with friends and family. View your overall cardiovascular fitness in the Fitbit app. See your cardio fitness score and cardio fitness level, which shows how you compare to your peers. In the Fitbit app, tap the heart-rate tile and swipe left to see your detailed cardio fitness stats. For more information, see help.fitbit.com. 31 Update, Restart, and Erase Learn how to update, restart, and erase FB421. Update FB421 Update your tracker to get the latest feature enhancements and product updates. Regularly sync FB421 with the Fitbit app and let the Fitbit app run in the background on your phone, which allows a small portion of the firmware update to download to your tracker each time you sync. You may need to adjust your phones settings to allow the Fitbit app to run in the background. When an update is ready to install, a notification appears in the Fitbit app. After you start the update, a progress bar appears on FB421 and in the Fitbit app as the update downloads, and then installs. Keep your tracker and phone close to each other during the update. Note: To update FB421, your tracker's battery must be at least 50% charged. Updating FB421 may be demanding on the battery. We recommend plugging your tracker into the charger before starting an update. For more information, see help.fitbit.com. Restart FB421 If you cant sync FB421 or you have trouble with tracking your stats, restart your tracker from your wrist:

Open the Settings app and tap Restart Device. If FB421 is unresponsive:

1. Connect FB421 to the charging cable connected to a power source. For instructions, see "Charge your tracker " on page 8. 2. Press and release the button on the charger cable end 3 times with 1 second between each press, and wait 10 seconds. When FB421 vibrates and shows a Fitbit logo, the tracker is restarting. Restarting your tracker reboots the device but doesn't delete any data. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Erase FB421 FB421 has a small hole (altimeter sensor) on the back of the device. Dont attempt to restart your device by inserting any items, such as paper clips, into this hole as you can damage your tracker. If you want to give FB421 to another person or wish to return it, first clear your personal data:

1. On FB421, open the Settings app 2. Touch the on-screen button for 3 seconds to erase your data.

> Device Info > Clear User Data. 33 Troubleshooting If FB421 isn't working properly, see our troubleshooting steps below. Visit help.fitbit.com for more information. Heart-rate signal missing FB421 continuously tracks your heart rate while you're exercising and throughout the day. If the heart-rate sensor on your tracker has difficulty detecting a signal, dashed lines appear. If your device doesn't detect a heart-rate signal, first make sure heart-rate tracking is turned on in the Settings app on your device. Next, make sure you're wearing your tracker correctly, either by moving it higher or lower on your wrist or by tightening or loosening the band. FB421 should be in contact with your skin. After holding your arm still and straight for a short time, you should see your heart rate again. For more information, see help.fitbit.com. Other issues If you experience any of the following issues, restart your device:

Won't sync Won't respond to taps, swipes, or button press Won't track steps or other data See "Restart FB421" on page 32 for instructions on how to restart your tracker. For more information or to contact Customer Support, see help.fitbit.com. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Sensors Materials Battery Memory Display General Info and Specifications Fitbit FB421 contains the following sensors and motors:

A MEMS 3-axis accelerometer, which tracks motion patterns An optical heart-rate tracker A GPS receiver An EDA (electrodermal activity) sensor ECG electrodes (NOTE: the app is not available in all regions) A vibration motor The housing on FB421 is aluminum. The FB421 classic band is made of a flexible, durable silicone material similar to that used in many sport watches. FB421 contains a Bluetooth LE transceiver and GPS receiver. Wireless technology Haptic feedback FB421 contains a vibration motor for alarms, goals, notifications, reminders, and apps. FB421 contains a rechargeable lithium-polymer battery. FB421 stores your data, including daily stats, sleep information, and exercise history, for 7 days. Sync your tracker with the Fitbit app to access your historical data. FB421 has an AMOLED color display. 35 Band size Band sizes are shown below. Note that accessory bands sold separately may vary slightly. Small band Fits a wrist between 5.5 - 7.1 inches (140 mm - 180 mm) in circumference Large band Fits a wrist between 7.1 - 8.7 inches (180 mm - 220 mm) in circumference Environmental conditions Operating 14 to 113 F temperature

(-10 to 45 C) Non-operating temperature

-4 to 14 F

(-20 to -10 C) 104 to 140F

(40 to 60 C) Storage temperature

-4 to 95 F for 6 months

(-20 to 35 C) Maximum operating 28,000 feet altitude

(8,534 m) Learn more Water resistance Water resistant up to 50 meters To learn more about your tracker, how to track your progress in the Fitbit app, and how to build healthy habits with Fitbit Premium, visit help.fitbit.com. Return policy and warranty Find warranty information and the fitbit.com return policy on our website. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. 37 Regulatory & Safety Notices Notice to the User: Regulatory content for certain regions can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info USA: Federal Communications Commission (FCC) statement Model FB421 FCC ID: XRAFB421 Notice to the User: The FCC ID can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Suppliers Declaration of Conformity Unique Identifier: FB421 Responsible Party U.S. Contact Information 199 Fremont Street, 14th Floor San Francisco, CA 94105 United States 877-623-4997 FCC Compliance Statement (for products subject to Part 15) This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference and 2. This device must accept any interference, including interference that may cause undesired operation of the device. FCC Warning 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Connect the equipment into an outlet on a circuit different from that to which Increase the separation between the equipment and receiver. the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. This device meets the FCC and IC requirements for RF exposure in public or uncontrolled environments. Canada: Industry Canada (IC) statement Model/Modle FB421 IC: 8542A-FB421 Notice to the User: The IC ID can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Avis l'utilisateur: L'ID de l'IC peut galement tre consult sur votre appareil. Pour voir le contenu:

Paramtres > Informations sur l'appareil > Informations rglementaires This device meets the IC requirements for RF exposure in public or uncontrolled environments. Cet appareil est conforme aux conditions de la IC en matire de RF dans des environnements publics ou incontrle 39 IC Notice to Users English/French in accordance with current issue of RSS GEN:

This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions:

1. this device may not cause interference, and 2. this device must accept any interference, including interference that may cause undesired operation of the device. Cet appareil est conforme avec Industrie Canada RSS standard exempts de licence (s). Son utilisation est soumise Les deux conditions suivantes:

1. cet appareil ne peut pas provoquer dinterfrences et 2. cet appareil doit accepter Toute interfrence, y compris les interfrences qui peuvent causer un mauvais fonctionnement du dispositif European Union (EU) Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Simplified EU Declaration of Conformity Hereby, Fitbit, Inc. declares that the radio equipment type Model FB421 is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: www.fitbit.com/safety Vereinfachte EU-Konformittserklrung Fitbit, Inc. erklrt hiermit, dass die Funkgerttypen Modell FB421 die Richtlinie 2014/53/EU erfllen. Der vollstndige Wortlaut der EU-Konformittserklrungen kann unter folgender Internetadresse abgerufen werden: www.fitbit.com/safety Declaracin UE de Conformidad simplificada Por la presente, Fitbit, Inc. declara que el tipo de dispositivo de radio Modelo FB421 cumple con la Directiva 2014/53/UE. El texto completo de la declaracin de conformidad de la UE est disponible en la siguiente direccin de Internet:

www.fitbit.com/safety Dclaration UE de conformit simplifie 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Argentina C-XXXXX Belarus Fitbit, Inc. dclare par la prsente que les modles dappareils radio FB421 sont conformes la Directive 2014/53/UE. Les dclarations UE de conformit sont disponibles dans leur intgralit sur le site suivant : www.fitbit.com/safety Dichiarazione di conformit UE semplificata Fitbit, Inc. dichiara che il tipo di apparecchiatura radio Modello FB421 conforme alla Direttiva 2014/53/UE. Il testo completo della dichiarazione di conformit UE disponibile al seguente indirizzo Internet: www.fitbit.com/safety Australia and New Zealand Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info 41 Botswana Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Customs Union Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Indonesia XXXXX/SDPPI/XXXX XXXX Israel Japan

. XX-XXXXX Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. R XXX-XXXXXX Kingdom of Saudi Arabia Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Mexico Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info La operacin de este equipo est sujeta a las siguientes dos condiciones:

1. Es posible que este equipo o dispositivo no cause interferencia perjudicial y 2. Este equipo o dispositivo debe aceptar cualquier interferencia, incluyendo la que pueda causar su operacin no deseada Morocco AGREE PAR LANRT MAROC Numro dagrment: MR XXXXX ANRT XXXX Date dagrment: XX/XX/XXXX 43 Connection and use of this communications equipment is permitted by the Nigerian Communications Commission. Nigeria TRA/TA-R/XXXX/XX Oman D090258 Pakistan PTA Approved Model No.: FB421 TAC No.: XXXXXXX Device Type: Bluetooth Philippines NTC Type Accepted No: ESD-XXXXXXXX 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Serbia Singapore South Korea Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info 45

(Model) FB421

(Head SAR) X.XXX W/kg Taiwan

Translation:

Notice to the User: Regulatory content can also be viewed on your device. Instructions to view content from your menu:

Settings > Device Info > Regulatory Info

Translation:

Warning Statement for Low Power Radios:

Without permission granted by the NCC, no company, enterprise, or user is allowed to change the frequency of an approved low power radio-frequency device, enhance its transmitting power or alter original characteristics or performance. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. The use of low power RF devices must not affect flight safety or interfere with legal communications: when interference is found, it should be immediately stopped and ameliorated not to interfere before continuing to use it. The legal communications mentioned here refer to radio communications operating in accordance with the provisions of the Telecommunication Law. Low power RF devices need to bear with interference from legal communications or industrial, scientific and medical radio wave radiating equipment Translation:

Battery warning:

This device uses a lithium-ion battery. If the following guidelines are not followed, the life of the lithium-ion battery in the device may be shortened or there is a risk of damage to the device, fire, chemical burn, electrolyte leakage and / or injury. Do not disassemble, puncture or damage the device or battery. Do not remove or try to remove the battery that the user cannot replace. Do not expose the battery to flames, explosions or other hazards. Do not use sharp objects to remove the battery. Vision Warning 3010221 47 Translation:

Excessive use may damage vision Warning:

Excessive use may damage vision Attention:

Rest for 10 minutes after every 30 minutes. Children under 2 years old should stay away from this product. Children 2 years old or more should not see the screen for more than 1 hour a day. Taiwan RoHS Part Name: Wireless Activity Tracker Model FB421

(Strap and Buckle)

(Electronics)

(Housing)

(Charging Cable) Restricted Substances and its chemical symbols

(Pb)

(Hg) O O

(Cd) O

(Cr+6)

(PBB)

(PBDE)

O O O O O O O O O O O O O O O O O O O O 1.0.1 wt %0.01 wt %

2. 3. United Arab Emirates Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Settings > Device Info > Regulatory Info TRA United Arab Emirates Dealer ID: DA35294/14 TA RTTE: ERXXXXX/XX Model: FB421 Type: Wireless Activity Tracker United Kingdom Notice to the User: Regulatory content for this region can also be viewed on your device. To view the content:

Settings > Device Info > Regulatory Info Vietnam T I B T I F X X X X X X X X X X X X X X X X Zambia ZMB / ZICTA / TA / XXXX / X / XX 49 About the Battery This unit contains a non-replaceable internal lithium-ion battery. The battery can burst or explode, releasing hazardous chemicals. To reduce the risk of fire or burns, do not disassemble, crush, puncture or dispose of in fire or water CAUTION: Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions. The battery must be recycled or disposed of properly Use the battery only in the specified equipment Do not leave the battery in an extremely high temperature environment that may result in an explosion or the leakage of flammable liquid or gas Do not subject battery to extremely low air pressure that may result in an explosion or the leakage of flammable liquid or gas IP Rating Model FB421 has a water resistance rating of IPX8 under IEC standard 60529, up to a depth of 50 meters. Model FB421 has a dust ingress rating of IP6X under IEC standard 60529 which indicates the device is dust-tight. Please refer to the beginning of this section for instructions on how to access your products IP rating. Safety Statement This equipment has been tested to comply with safety certification in accordance with the specifications of: EN60950-1:2006 + A11:2009 + A1:2010 + A12: 2011 +

A2:2013 & EN62368-1:2014 + A11:2017, & IEC 60950-1:2005 + AMD1:2009 +

AMD2:2013 & IEC 62368-1: 2014 (Second Edition) Regulatory Markings Device regulatory markings can be viewed on your device by removing the band. Markings are located in the band attach area. 2020 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks can be found at http://www.fitbit.com/legal/trademark-list. Third-

party trademarks mentioned are the property of their respective owners. Band Pocket View 51

Model FB421: E-Labeling To view the Regulatory information, users are able to access the information in 3 steps:

1) Click Settings 2) Click Device Info 3) Click Regulatory Info Upon successful completion of software update when pairing, the Regulatory Info menu option will display the additional regulatory information. The information is stored on the device, no special accessories or supplemental plug-ins (e.g. a SIM/USIM card) are required to access the information. This E-Label is pre-programmed by the applicant. The user cannot modify the E-Label information. An image of the E-Label screen is shown below. Fitbit, Inc. 199 Fremont Street, 14th Floor San Francisco, CA 94105 Fitbit, Inc. 199 Fremont Street, 14th Floor San Francisco, CA 94105

TITLE BLOCK

REVISION

DATE

A

04.06.2021

PART NO.

127-1180-01

DESCRIPTION

LBL, ARTWORK, UPC CODE, EFIGS - MORGAN

DIELINE NO.

126-0310-01

OWNER

A. PAWAR

PROCESS COLOR

Y N

SPOT COLOR

Y N

NO. OF COLORS

1

COATINGS/FINISHES

SPOT SPECS

K @ 100%

ADDITIONAL NOTES

TIED TO 280-0636-01 A

127-1180-01_Morgan_UPC_EFIGS_RD2.pdf 1 4/6/21 12:11 PM

Morgan UPC-A and serial code labels

Label content and placement per region. Please adhere to bottom of box.

85.5

1R

2021 © Fitbit, Inc. All rights reserved. Trademarks registered and/or owned by Fitbit include Fitbit, Fitbit logo, Fitbit Charge.

Third-party marks belong to their respective owners. g.co/patents

Fitbit, Inc.

199 Fremont Street, 14th floor

San Francisco, CA 94105

Fitbit International Ltd.

76 Lower Baggot St,

Dublin 2, Ireland

FCC ID: XRAFB421

M/N: FB421

280-0636-01 A

Manufactured in Malaysia.

Designed in San Francisco, CA.

Fitbit Limited

100 New Bridge Street

London EC4V 6JA

United Kingdom

C

M

Y

CM

MY

CY

CMY

K

BUZZ Regulatory Marks: EFIGS

21

85.5

1R

2021 © Fitbit, Inc. All rights reserved. Trademarks registered and/or owned by Fitbit include Fitbit, Fitbit logo, Fitbit Charge.

Third-party marks belong to their respective owners. g.co/patents

Fitbit, Inc.

199 Fremont Street, 14th floor

San Francisco, CA 94105

Fitbit International Ltd.

76 Lower Baggot St,

Dublin 2, Ireland

FCC ID: XRAFB421

M/N: FB421

280-0636-01 A

Manufactured in Malaysia

Designed in San Francisco, CA.

Fitbit Limited

100 New Bridge Street

London EC4V 6JA

United Kingdom

38

38

21

21

3 A X X X X X X X X X X

3 A X X X X X X X X X X

168 E. Highland Ave.

Elgin, IL 60120

847.931.6301

Black

Dieline

Print at CM

K

75%

50%

25%

75%

50%

25%

Print

at CM

Federal Communications Commission

7435 Oakland Mills Road

Columbia MD 21046

Subject: Request for Confidentiality

FCC ID: XRAFB421

To Whom It May Concern:

Pursuant to the provisions of Sections 0.457 and 0.459 of the Commission’s rules (47 CFR §§ 0.457, 0.459), we

are requesting the Commission to withhold the following attachments as confidential document from public

disclosure indefinitely.

Schematic Diagram

Block Diagram

Operational Description

Antenna Specification

Above mentioned document contains detailed system and equipment description are considered as

proprietary information in operation of the equipment. The public disclosure of the above documents might

be harmful to our company and would give competitors an unfair advantage in the market.

In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commission’s

policy, in order to comply with the marketing regulations in 47 CFR §2.803 and the importation rules in 47 CFR

§2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of

newly authorized devices. We are requesting the commission to grant short-term confidentiality request on

the following attachments until 180 days from our grant date.

External Photos

Internal Photos

Test Setup Photos

User Manual

It is our understanding that all measurement test reports, FCC ID label format and correspondence during

certification review process cannot be granted as confidential documents and that information will be

available for public review once the grant of equipment authorization is issued.

Best Regards,

Adam Vasquez (Mar 24, 2021 16:25 PDT)

Adam Vasquez

Head of Fitbit Regulatory and Product Safety

Fitbit, Inc.

March 24, 2021

Fitbit, Inc.

199 Fremont Street, 14th Floor

San Francisco, CA 94105

To Whom It May Concern, Date: March 24, 2021 Please be notified that I, Adam Vasquez, have designated Jones Tsai of Sporton International Inc. as the person being responsible for this project and to sign the form 731 and other documentation. Any and all acts carried out by Jones Tsai in Sporton International Inc. on the matters of relating to all processes required in the FCC approval and any communication needed with the national authority, shall have the same legal authority as acts on our own behalf. We further certify that neither the applicant nor any party to this application, as defined in 47 CFR Ch. 1.2002 (b), is subject to a denial to Federal benefits, that include FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1998, 21 U.S.C. 862. This authorization is limited to the following product:

FCC ID: XRAFB421 If you have any acknowledgement and response, please send it to Sporton International Inc. directly. Sincerely yours, Adam Vasquez (Mar 24, 2021 16:38 PDT) Adam Vasquez adamnv@google.com Fitbit, Inc. 199 Fremont Street, 14th Floor San Francisco, CA 94105

FCC Supplier Declaration of Conformity

Applicant

Equipment

Brand Name

Model Name

: Fitbit, Inc.

: Wireless Activity Tracker

: Fitbit

: FB421

For product subject to authorization under Supplier’s Declaration of

Conformity, Fitbit, Inc. shall be the responsible party, as designated in §2.909.

The responsible party warrants that each unit of equipment marketed under

Supplier’s Declaration of Conformity will be identical to the unit tested and found

acceptable with the standards and that the records maintained by the responsible

party continue to reflect the equipment being produced under such Supplier’s

Declaration of Conformity within the variation that can be expected due to quantity

production and testing on a statistical basis.

For equipment subject to Supplier’s Declaration of Conformity, the responsible

party must reevaluate the equipment if any modification or change adversely

affects the emanation characteristics of the modified equipment. The responsible

party bears responsibility for continued compliance of subsequently produced

equipment.

Responsible party:

Responsible party (name):

Adam Vasquez (Mar 24, 2021 16:24 PDT)

Adam Vasquez

Head of Fitbit Regulatory and Product Safety

Fitbit, Inc.

199 Fremont Street, 14th Floor

San Francisco, CA 94105