FCC ID: 2A7JZ-D930-L Sound amplifier

USER GUIDE D9 series D9 series Bluetooth Hearing Devices Congratulations Thank you for choosing a new rechargeable Bluetooth hearing devices D9 series. This is a multi-channel digital hearing device. It supports Bluetooth 5.0 By connecting mobile phones and other Bluetooth transmitters, you can easily make calls, listen to music, watch TV and other audio directly. With superior sound quality and thoughtful design, when you are familiar with using D900, it will bring you a more exciting world with sound, bless you. Contents

. How To Use Your Hearing Device Getting To Know Your Device6 How To Turn On/Off Devices7 Adjusting Volume Levels8 How To Change Programs9 How To Wear The Device11

. Bluetooth Function And Charging Pair With Mobile Phone12 How To Make Calls And Listen To Music14 Charging Box17 Charging The Hearing Devices18 Battery Reminder19 Contents

. Maintenance Get Ready To Hear Better20 Maintenance21 Changing Ear Dome22

. Troubleshooting Trouble Shooting24 Device Failure Self-Checking27

. Others Technical Specification30 Product Parameter31 Hearing Rehabilitation Plan32 Fcc Warning Statement34 Getting To Know Your Device Microphone Volume control/

Program switch Charging contacts Ear dome Bluetooth Rechargeable 6 How To Turn On/Off Devices Turn on

- Automatic: take it out of the charging box;

- Manual: press and hold the VC button for 5S to turn on. Turn off

- Automatic: put it back in the charging box;

- Manual: Press and hold the VC button for 5S to turn off. Automatic Manual 7 Adjusting Volume Levels When in amplifier mode:

- Short press the VC button on device to adjust the volume levels

- Volume levels change in cycle, such as 1...5...10...1...5...10.

(Short press) When in bluetooth mode:

Volume levels need to be adjusted on your phone. Tips: You will hear a SINGLE beep when the volume is adjusted. DOUBLE beeps when volume limit has been reached. 8 How To Change Programs Long press the VC button on device for 2s to change programs. Programs change in cycle, such as 1-2-3-1-2-3 P1: General Hearing Mode P2: Noise Reduction Hearing Mode P3: Outdoor Hearing Mode you will hear the beep(s).

(Press and hold for 2 s) Tips: Devices will remember the setting that used last time. 9 Programs Introduction 3 Programs Environment P1: General Hearing Mode In a constant quiet environment like at home having a conversation with people. In a noise restaurant having a conversation with people beside you. Alert Beep Beep, beep In a loud place with limited noise level around you. Beep, beep, P2: Noise Reduction Hearing Mode P3: Outdoor Hearing Mode 10 How To Wear The Device Hold your hearing device with your thumb and forefinger. Alert Gently insert the device into your ear canal. Gently push the hearing device into your ear until it feels comfortable in your canal. Make sure you insert the device as quickly as possible to avoid feedback. Tips:

To help wearing, you can pull the outer ear backwards and upwards with the opposite hand. The device would whistle for a while until the eartip feels secure and tight. 11 Pair With Mobile Phone For The First Time Take the hearing device out of the charging box. Turn on the Bluetooth in your phone settings to allow the phone communicate with the device. You can wear it normally after pairing successfully. 12 Pair With Mobile Phone For The First Time Tips:

The First connection requires manual pairing, and the second and subsequent connections are automatic connections

(if the phone is difficult to connect, please connect manually). When the mobile phone is not connected within 3 minutes after the signal search, the Bluetooth function will be turned off. If the connection fails, please close the bluetooth page and open it again. 13 How To Make Calls And Listen To Music After completing the pairing, wear your hearing devices. Answer the call: short press the VC button on one device to answer the call or press the answer on your mobile phone. Hang up the call: short press the VC button on one device to hang up the call or hang up on your mobile phone. 14 How To Make Calls And Listen To Music After completing the pairing, wear your hearing devices. Open the music/video on the mobile phone and play it, and then you can hear the music/video. Stop playback: short press the VC button to stop or stoping on the phone, and then the devices will automatically switch to amplifier mode. Replay: the Bluetooth connection is successful, play the audio again on your phone, and you can listen to the music through hearing devices again. 15 Prompt Tone Turn off devices: POWER OFF;

Bluetooth connection is successful: CONNECTED. Bluetooth disconnected: DISCONNECTED. Low voltage prompt: LOW BATTERY Tips:

After the Bluetooth connection is successful. When you have been wearing the hearing devices, the Bluetooth will always be connected. When you turn off the hearing devices manually or put it back in the charging case, the Bluetooth will disconnect. When you turn on the hearing devices manually or take it out of the charging case, the Bluetooth will automatically connect again. 16 Charging Box Power Indicator Charging: white Discharge: white Full charge: light off Devices Charging Indicators Charging: Breathing light white Full charge:lights off Type-C charging interface Indicator light Box Electricity Tips:

It takes 2-3 hours for a pair of devices to be fully charged, and the charging case will stop charging automatically. 25%

50%

75%

100%

17 Charging The Hearing Devices This product includes the hearing devices and a charging case. Before using the hearing devices for the first time, it is recommended that you charge it for 3-4 hours. The hearing devices has a built-in and non-removable rechargeable battery. The charging case has a built-in and non-removable rechargeable battery. Be sure to keep the devices dry before charging. Please make sure to charge and use the hearing devices in the operating temperature range: +5 to +40 C (41 to 104 F). 18 Battery Reminder When the mobile phone is paired with Bluetooth, the hearing device function and the Bluetooth audio function exist at the same time, and they are automatically switched according to the user s operation needs. When the battery is low, the Bluetooth connection function will automatically disconnect and notice: low battery, please charge. At this time, the hearing device function can still last for about 10-30 minutes, and then the hearing device function is completely closed. The charging box of this product has a power storage function. It is recommended to maintain sufficient power for the power storage function to ensure the long-term battery life of the hearing device. 19 Hear Better In 4 Steps STEP 1: Dome size A right size eardome would feel secure and tight in your canal. STEP 2: Programs Choose the right program for your environment. STEP 3: Volume Slowly increasing the volume as needed. STEP 4: MAINTENANCE Clean your devices regularly and replace eardome as needed. 20 Maintenance Daily maintenance your hearing devices After taking off the hearing devices, clean earwax and debris from the device eardome sound outlet and the microphone using the provided cleaning brush. Weekly maintance Wipe charging case and hearing devices body witha soft lint-free cloth. Cleaning the charging contact on devices and charging case with the provided cleaning brush. Quaterly maintance Replace the device ear domes every 2-3 months. 21 Changing Ear Dome Removing the domes Pinch the body of the device, turn the eardome upside down. pinch under the dome and wiggle slightly to pull it off the device. Installing the domes Tilte the eardome head at 45 . Fix the eardome on the device. Press the eardome head clockwise with your thumb until put it on. 22 TIPS:

Whistling/feedback occurs when amplified sound leaks out of the ear and returns to the device microphone and is re-amplified. If you experience feedback at higher volumes try changing a new dome with right size for you. For optimum performance, replace ear tip every one or two weeks. Any blockage inside your ear, like ear wax, can cause a feedback reaction. Avoid physical shock like dropping your device on a hard surface. Avoid exposure to moisture or heat.Store in a cool, dry place. 23 Trouble Shooting SYMPTOM POSSIBLE CAUSES SOLUTIONS Volume too low lncrease volume if volume control available Device is not charged Place charging the hearing device until the in dicator is lighted in white color Microphones are clogged Clean out any debris from the mic holes No Sound Ear Domes clogged Clean out any debris from the ear domes Low battery Place the devices into the charging base to charge Ear Domes are too loose Choose a suitable size ear dome, wear it correctly. Earwax in ear dome Hearing has changed Clean out any debris from the ear domes and receiver area with the cleaning brush Contact your physician to report any sudden drop in hearing Vo i c e s a r e low, very weak, or unclear 24 Trouble Shooting SYMPTOM POSSIBLE CAUSES SOLUTIONS Bluetooth connection H e a r i n g d e v i c e c a n n o t connect to your phone, or take a long time to connect Make sure that your headphones are not connected to other devices, and that your device is not connected to other Bluetooth devices. 1. Put the devices into charging case and take out them. 2. Long press the button on the device for 5s to turn them off. Turn them on again. 3. Forget D930 on your smart phone's bluetooth setting. And then connect devices again. Your hearing device are connected to other phone Turn off Bluetooth on other phone. It will immediately disconnect your hearing device from the phone.To reconnect yourphone again Bluetooth connection is not stable and causes some interruptions Try shortening the distance between your hearing device and device. Avoid solid barriers in between. 25 Trouble Shooting SYMPTOM POSSIBLE CAUSES SOLUTIONS Incorrect orientation Charger battery depleted Poor contact between h e a r i n g d e v i c e a n d charging base Ensure the USB cable is connected to the Charging base plugged into power. The base power status lights will blue to indicate charging. Reposition your hearing devices in their slots, ensuring the contact points are touching the charge points in the base. Reinsert the hearing device into the charging base Hearing device reverse Check to see if the hearing device is reversed Hearing devices whistling in the charger After the hearing device is connected, the hearing device indicator is not lit 26 Device Failure Self-Checking

[Fault self-check]

project Possible Causes Solutions Hearing device has no sound The button time is too short to start Long press the button for 3 seconds, restart B a t t e r y f u l l y discharged Connect the hearing device to the charging base for charging Low battery Connect the hearing device to the charging base for charging The voice is very weak and unclear Volume is set too low Increase volume if volume control available Ear Domes are too loose Hearing device not inserted correctly into earwear it correctly Hearing device plays notification sound Indication for low battery Charge hearing device 27 Device Failure Self-Checking

[Fault self-check]

project Hearing device plays notification sound Indicator light on hearing device does not light up when hearing device placed in charging inserts 28 Possible Causes Solution Indication for low battery Charge hearing device Hearing device not inserted correctly into charger Insert hearing device correctly into charger Charger not connected to power source Connect charger to external power supply Battery fully discharged Wait three hours after placing hearing device in charger, regardless of LED behavior Device Failure Self-Checking Possible Causes Solution Poor contact between h e a r i n g d e v i c e a n d charging base Reinsert the hearing device into the charging base Hearing device reverse Check to see if the hearing device is reversed

[Fault self-check]

project After the hearing device is connected, the hearing device charging indicator is not lit Hearing device indicator lights are dark or dim Dirty charging contacts Charging does not start Hearing device not inserted correctly into charger Clean the contacts of the hearing device and the charger Insert hearing device correctly into charger 29 Technical Specification Max-OSPL90 HAF-OSPL90 FOG50 FHA Avg 120dB 1064dB 42dB 323dB Frequency Range F1 350Hz F2 4000Hz Eq.Input Noise Level 32dB THD at 500/800/1600Hz 3%

30 Product Parameters Bluetooth protocol: HFP/A2DP/AVRCP Bluetooth specification: Bluetooth 5.0 Communication distance: 6 meters (barrier-free) Working hours:

Music play only is up to about 6-7hours (affected by volume and audio content) When the Bluetooth is disconnected, the hearing device function is up to about 35 hours Charging time: 2-3 hours Hearing device/charging case battery capacity: 70mAh/400mAh Tips: The above specifications are laboratory testing data. 31 Hearing Rehabilitation Plan Hearing devices reproduce an abundance of sounds which frequently havent been experienced for many years. Every person reacts differently the first time he or she wears hearing device. The familiarization phase therefore differs from person to person. Below is a rehabilitation plan for first time users or those using new hearing device. 32 Hearing Rehabilitation Plan a) The First Stage (week 1) 1 to 2 hours wearing per day, you are suggested to wear in a relatively quiet environment to familiarize and distinguish various sounds. b) The Second Stage (week 2) 4 to 8 hours wearing per day, you may wear your hearing devices and walk in a relatively quiet environment to listen around. c) The Third Stage (week 3) You may wear hearing devices and go to public areas. You may have dialogue with your friends. d) The Fourth Stage (week 4) You may prepare for traveling, go to supermarket, restaurant, participate in music concert or watch video. Then you may find many enjoyments in life with clear hearing again. 33 FCC Warning Statement Changes or modifications not expressly approved by the parties Responsibility for compliance may void the user's authority to operate the equipment. 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. The device is intended for use and can radiate radio frequency energy, 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 device does cause Harmful interference to radio or television reception 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.

-- 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 connected.

-- Consult the dealer or an experienced radio/TV technician for help. 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 received, including interference that may cause undesired operation 34 H E A R I N G B E T T E R ENJOY LIFE

< Xiamen Wenatone Medical Technology Co., Ltd. >

Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD21046 Subject; Request for Long Term Confidentiality FCC ID: 2A7JZ-D930-L To Whom It May Concern, Date: Sep. 29, 2022 Pursuant to the provisions of the Commissions rules Title 47 Sections 0.457 and 0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature:

Name: YongQuan Liu Title: Manager

Xiamen Wenatone Medical Technology Co., Ltd. Letter of Authorization Company: Xiamen Wenatone Medical Technology Co., Ltd. Address: 805A, Jianye building,Torch hi-Tech (Xiang An) industrial park, Xiamen, China Product name: Sound amplifier Trade Name: N/A Model name: D930 FCC Identifier: 2A7JZ-D930-L We authorize MiCOM LabsInc, 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM LabsInc, 575 Boulder Court, Pleasanton, California 94566, USA, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: YongQuan Liu Date: Sep. 29, 2022 Title: Manager Signature of applicant: