FCC ID: 2BC3X-GTS4 Smart watch

smart wristband user's Guide Wear it properly The bracelet is best worn aer the ulnar styloid Adjust the size of the wrist according to the adjustment hole; buckle the wrist strap buckle. The sensor should be close to the skin to avoid moving Charge the bracelet Use it for the rst me to ensure that the baery is in normal condion. If the power is not turned on normally, please connect the charger to charge the device. Install the bracelet app on your phone Scan the QR code or go to the App Store, app download and install the app. Android/IOS System requirements: Android 5.0 and above; iOS9.0 and above; support for Bluetooth 4.0. Device connecon For the rst use, you need to connect the APP for calibraon. Aer is successful, the bracelet will automacally the connecon synchronize the me. Turn on the Bluetooth switch of the mobile phone system enter the app device module sengs click Bind device, experience more features to enter, it will automacally search for nearby Bluetooth devices on the bracelet, nd and connect the bracelet device. Aer the pairing is successful, the APP will pop up a guide page. According to the instrucons, jump to the mobile phone system Bluetooth search t

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/H18/H19/H20 the connecon is successful, you can make / receive calls and listen to music (Note: If the mobile phone system Bluetooth has not been searched equipment, please enter the Dual mode menu and set it to On, you cannot make calls without connecng the equipment.) APP will automacally save the Bluetooth address of the bracelet, and the APP will open and run in the background, and will automacally search and connect the bracelet;

Android phones use all nocaon permissions to read contact informaon and give the app background running in the phone sengs. Bracelet funcon descripon Slide down the standby page to enter the nocaon reminder, and slide up to enter the control center Swipe le or right on the standby page to cycle through the dials Long press 2 seconds on any dial page to start the language assistant. (Remarks: The mobile phone also needs to be connected to the device, and the smart phone needs to voice in advance in the voice menu) set the user's Click the screen on the standby page to enter the main menu, the style of the main menu can be switched Bracelet reset device This funcon will clear all data of the bracelet

(such as step counng) Switch to the heart rate three-in-one interface to start the test, heart rate three-in-one interface 60s meout automacally o screen

(heart rate and blood pressure need bracelet hardware support). Clock interface Aer synchronizing with the phone, the bracelet will automacally calibrate the me;

Swipe le or right on the standby page to cycle through the dials Step Number of steps Wear the bracelet and record the number of daily movement steps to view the current real-me steps. distance The distance of moon is esmated based on the number of walking steps. Calories Esmate the calories burned based on the number of walking steps Heart rate, blood pressure, blood oxygen three-in-one Aer entering the heart rate three-in-one test interface for a few seconds, the current heart rate, blood pressure, and blood oxygen test results are displayed. This feature requires a wristband to support heart rate and blood pressure sensors. dial Dial pad for making calls (note: the phone also needs to be connected to a device) phone book Add 8 commonly used contacts in the APP. Aer the bracelet is successfully connected with the APP Bluetooth, the contacts can be displayed in the bracelet phone book. Click the contact to make a call

(Note: The phone needs to be connected to a device) Music control The bracelet can control the previous song and the next song, and pause

/ start playback. (Note: devices need to be connected to use this feature phone) Dual mode switch This switch needs to be turned on for the phone to search for the device. If the phone is not connected to the device within 5 minutes aer the bracelet is turned on, the switch will be turned o automacally, and it needs to be turned on manually when it is used again. exercise more All sports modes can record the calories and duraon of skipping rope. Sleep mode When you fall asleep, the bracelet will automacally enter the sleep monitoring mode; automacally detect your deep sleep / light sleep /

wake up all night, calculate your sleep quality; the wristband only shows the total length of deep sleep / light sleep / sleep, APP end can View sleep data details. Note: Sleep data will be available when you wear your wristband and sleep will be detected from 10:00 pm. Sleeping data for 3/4 hours can be synchronized to the app while sleeping. Informaon mode Informaon menu can view the latest news content Stopwatch funcon Enter the stopwatch and click the start buon to start ming, click the pause buon to stop, and click the reset buon to clear the ming. Custom dial You need to connect to the APP to get the dial sengs, you can choose the recommended dial / default dial / album custom dial to synchronize to the bracelet. APP funcon and sengs Personal informaon Please set your personal informaon aer entering the app. Sengs Personal Informaon, you can set gender - age - height -

weight - distance You can also set your daily goal steps to monitor daily compleons. Applicaon push SMS nocaon:

In the connected state, if the SMS reminder funcon is enabled, the bracelet will vibrate when there is a text message. Other reminders:

In the connected state, if this funcon is enabled, when there are messages such as WeChat, QQ, Facebook, etc., the bracelet will vibrate to remind and display the content received by the app (You need to give the APP permission to get system nocaons, and the wristband can display 20-40 words). Note: Incoming call reminder system is enabled by default, no switch opon (calls for incoming calls need to be connected to device) Other funcons:

Turn on the vibraon seng funcon, when there are calls, messages or other reminders, the bracelet will vibrate. If it is o, the bracelet will only have a screen reminder without shaking to avoid interrupon. Tips for Android users:

When using the reminder funcon, you need to set it to allow "FitPro" to run in the background; it is recommended to add "FitPro" to the rights management and open all permissions. Alarm seng In the connected state, 8 alarms can be set. Aer seng, it will be synchronized to the bracelet; oine alarm is supported. Aer the synchronizaon is successful, even if the APP is not connected, the bracelet will be reminded according to the set me. Looking for a bracelet In the connected state, click the Look for the bracelet opon and the bracelet will vibrate. Remote photography In the connected state, start the photo from the wristband or the APP to enter the remote camera interface, shake/turn the wrist/touch the bracelet, and automacally take a photo aer 3 seconds of counng down. Please allow the APP to access the photo album to save the self-portrait photo. Sedentary reminder Set whether to enable the sedentary reminder funcon, you can set the reminder interval, if you sit for a long me in the set me, the bracelet will remind you. Raise your hand to brighten Turn this funcon on. When the wristband is in the state of the screen, li your wrist and turn the screen to yourself to light up the screen. Do not disturb mode Turn on the Do Not Disturb mode. You can set the Do not disturb me period. During the set me period, the bracelet stops receiving nocaon messages to avoid reminding messages. Device reset Lithium polymer of sensor

-10C~50C smart wristband stand by type baery Synchronously Bluetooth 4.0 Seng this feature reset will erase all data in the bracelet (such as step counng) Remove device Remove device This feature will erase data and remove device Basic parameters Equipment type Vibraon motor Operang temperature System Requirements Precauons 1. Bathing and swimming should not be worn. 2. Please connect the bracelet when synchronizing data. 3. Use the included charging cable to charge. 4. Do not expose the handle ring to moisture for a long me, where the temperature is extremely high or extremely low. 5. The ashover of the wristband restarts. Please check the memory informaon of the mobile phone to clear it and try again, or exit the APP and reopen it. IOS9 or above / Android5.0 or above Lowpower acceleraon sensor reasonable frequency harmful FCC Warnning:

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 protection againstharmful interference in a residential installation. This equipment generates, with uses and can radiateradio the there is equipment determined by turning the equipmentoff interference Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is in communications. installation. maycause thatinterference cause harmfulinterference to radio or television reception, which can be instructions, guarantee does energy and, interference occur accordance However, If thefollowing measures:

radio a encouraged if to in one particular installed correct more used user and and this will not not the on, the try no by or to to of is connected. Consult the dealer or an experienced radio/TV technician for help. Caution:

could void your authority to operate this equipment. modications changes Any this or to device not explicitly approved by manufacturer with complies device This conditions:

(1)This interference received, including interference that may cause undesired operation. interference, Operation harmful subject device device Rules. cause may part and FCC this not the

(2) 15 to of is the following two must accept any set with forth for an minimum uncontrolled 0cm distance exposure radiation be installed and limits operated This with complies equipment equipment FCC This environment. should between the radiator and your body.

Dongguan Langchen Technology Co.,Ltd. Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town,Dongguan City, Guangdong Province China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern:

2024-3-20 We, Dongguan Langchen Technology Co.,Ltd., hereby certify that the equipment for which authorization is sought (FCC ID: 2BC3X-GTS4) is not covered equipment prohibited from receiving an equipment authorization pursuant to 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www.fcc.gov/supplychain/coveredlist) as an entity producing covered equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under 2.911(b) and (d)(5) and (6). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature Lan Zhou Manager Dongguan Langchen Technology Co.,Ltd. 3 0 V

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CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2024-3-20>

Pursuant to Paragraphs 0.457 and 0.459 of the Commissions Rules (47 C.F.R.) and Section 552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products:

FCC ID 2BC3X-GTS4 Model name GTS4 For the product stated above, we request that the following information be held confidential;

Exhibits Long-Term Short-Term Short-Term Confidentiality Confidentiality Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos Users Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title Lan Zhou/Manager Company:

Address:

Dongguan Langchen Technology Co.,Ltd. Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town,Dongguan City, Guangdong Province China 18823709181 N/A 18823709181@163.com Phone:

Fax:

E-Mail:

Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town,Dongguan City, Guangdong Province Dongguan Langchen Technology Co.,Ltd. China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern:

2024-3-20 We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2BC3X-GTS4 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. By signing this application form, we agree to Eurofins current valid General Terms and Conditions

(AGB),Testing and Certification Regulations (PZO) which can be viewed on following website www.eurofins.de/ee or retrieved on request. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title Company:

Address:

Phone:

Fax:

E-Mail:

Lan Zhou/Manager Dongguan Langchen Technology Co.,Ltd. Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town,Dongguan City, Guangdong Province China 18823709181 N/A 18823709181@163.com

Dongguan Langchen Technology Co.,Ltd. Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province. China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 U.S. Agent Designation 2024/03/18 Dongguan Langchen Technology Co.,Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought

(FCC ID: 2BC3X-GTS4):

Name and company of U.S. agent:

GSS SERVICE INC Physical U.S. address of agent:

6547 N Academy Blvd #2266 Colorado Springs COLORADO 80918 FRN of U.S. agent:

United States 0033402082 Email address of U.S. agent:

MichouxLogan@outlook.com GSS SERVICE INC acknowledges their obligation to accept service of process on behalf of Dongguan Langchen Technology Co.,Ltd. Dongguan Langchen Technology Co.,Ltd. with the FRN [0034327130] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. 5 0 V

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_ 8 4 Sincerely, Signature Lan Zhou Manager Signature Michoux Logan PM Dongguan Langchen Technology Co.,Ltd. GSS SERVICE INC