FCC ID: 2A4G4XM-BT-16 Bluetooth voice remote controller

Shenzhen Xeme Communication Co., Ltd FCC ID:2A4G4XM-BT-16 PART SHEET FOR APPROVAL Manufacturer Supplier:

Part Description:

Model No:

Customer Model:

Customer item No:

Software version:

Issued Date Supplier confirmation Shenzhen Xeme Communication Co., Ltd Shenzhen Xeme Communication Co., Ltd Bluetooth voice remote controller XM-BT-16 110400735 HXD_K16X_B037_D1001 2022.8.2 Made By Engineer Approver SDMC confirmation

Approval Reason Made By New Part Substitute Part Quality Engineer R&D Sales Approver NoteSignature indicates that the submitted sample is approved and the drawing/specification is now the controlling document. Shenzhen Xeme Communication Co., Ltd Address: West Tower, Digital Culture Industrial Base,Nanshan District, Shenzhen, Guangdong province China 1 Product specifications .................................................................................................................. 3 2 Functional specifications ............................................................................................................. 4 2.1 Key Description ..................................................................................................................4 2.1.1 Remote control appearance ........................................................................4 2.1.2 Key value ................................................................................................................. 4 2.2 Power supply instructions .............................................................................................. 6 2.2.1 Battery specifications .......................................................................................... 6 2.2.2 Operating mode ................................................................................................... 6 2.2.3 Hibernation mechanism .....................................................................................6 2.3 Pairing instructions ........................................................................................................... 7 2.3.1 Paired key combination .................................................................................7 2.3.2 Automatic pairing ................................................................................................ 7 2.3.3 Manual pairing steps ................................................................................. 8 2.3.4 Unpair .......................................................................................................................9 2.3.5 Report function .....................................................................................................9 2.3.6 Back-connection mechanism .......................................................................... 9 2.4 Voice description ............................................................................................................10 2.5 Indicator light description .......................................................................................11 2.5.1 Infrared mode .....................................................................................................11 2.5.2 Bluetooth mode ................................................................................................. 11 2.5.3 Pairing status ....................................................................................................... 11 2.5.4 Recording status ................................................................................................ 11 3 BOM ................................................................................................................................................. 12 4 Performance specifications ......................................................................................................14 4.1 Performance .............................................................................................................................. 14 4.2 Microphone parameters ..........................................................................................16 4.3 Electrical parameters .....................................................................................................16 4.4 Reliability test .............................................................................................................. 18 4.4 Remote control upgrade .........................................................................................21 5 Packing Specification .................................................................................................................21 5.1 Label description .............................................................................................................21 5.1.1 Warehouse label ................................................................................................ 21 6.1.2 PE PE Bag label ........................................................................................................21 5.1.3 SN SN Rule .................................................................................................................... 22 5.2 Out box descriprion ..................................................................................................23 5.2.1 Outer box size ................................................................................................23 5.2.2 Out box label ..................................................................................................23 2 / 25 Shenzhen Xeme Communication Co., Ltd BT-16-HXD-735 BT-16-HXD-735 Product Specification 1 Product specifications No. illustrate Technical specifications 1 2 3 4 5 6 7 8 Number of keys Product Size Free height of keys 16 16 keys 150mm*39mm*19mm 2mm ABS Shell plastic material ABS raw material Shell color Plastic natural color, black Silk screen requirements Acid and alcohol resistant PCB PCB circuit board material FR-4 OSP Double-sided board, FR-4 board, green white lettering, carbon oil and OSP ABS The surface of the remote control shell is made of ABS surface treatment Surface coating treatment The surface should be flat and firm, and no scratches, spots, sagging, falling off and damage are allowed 9 Circuit board production requirement No flying lead, no zero ohm jumper Full solder joints, no false soldering, desoldering, or even tin All printed circuit boards should be corrosion resistant 10 P+R Button requirements P+R button. Plastic shell and silicone lining 3 / 25 Shenzhen Xeme Communication Co., Ltd 11 12 Conductive glue material Using silica gel raw materials (no powder), no irritating odor, the process of making pot slices under the conductive glue Pot slices 30 The service life of all keys on the remote control is 300,000 times 2 Functional specifications 2.1 Key Description 2.1.1 Remote control appearance 2.1.2 Key value NEC0x08F7 infrared protocolNEC, user code0x08F7 No. HID key code value table HID Key name Infrared key Usage ID Usage Page 4 / 25 illustrate Shenzhen Xeme Communication Co., Ltd Power 0x0A NA NA BT RC IR IR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Mute 0x0D 0x0C 0x00E2 Back 0x1C 0x0C 0x0224 Home 0x2E 0x0C 0x0223 IR IR BT BT BT IR Google Assistant OK Up 0x2E 0x0C 0x0221 IR BT BT 0x1F 0x0C 0x0041 0x00 0x0C 0x0042 Down 0x01 0x0C 0x0043 Left 0x03 0x0C 0x0044 Right 0x02 0x0C 0x0045 Vol+

0x58 0x0C 0x00E9 Vol-

0x5D 0x0C 0x00EA Projector Focus Projector Home 0x74 NA NA IR BT D-pad OK/right/lift Back 4 IR OK/Back 4 BT OK/Back 15s 4 BT IR 0x08 NA NA BT RC IR IR IR BT 15 Netflix 0x4E 0x0C 0x0008 5 / 25 Shenzhen Xeme Communication Co., Ltd 16 Prime Video 0x2E 0x07 0x003E IR BT BT BT IR 2.2 Power supply instructions 2.2.1 Battery specifications 2 7 AAAPowered by 2 AAA batteries 2.2.2 Operating mode The remote control starts to work after inserting the batteries. The remote control is divided into infrared mode and bluetooth mode according to the key code format. When the remote control is not connected to the host or paired and not connected, the remote control is in infrared mode. After the key is pressed, the infrared key value code is emitted; when the remote control is When connecting with the host's Bluetooth, after pressing the key, the Bluetooth key value code is sent out. 2.2.3 Hibernation mechanism 15s In infrared mode, when the remote control is not operated for 15s, the remote 6 / 25 Shenzhen Xeme Communication Co., Ltd control enters the sleep state. 15s 1s When Bluetooth is connected, when the remote control is not operated for 15s, the remote control enters the sleep state. (In sleep mode, a Bluetooth heartbeat packet is sent every 1s) In the sleep mode, the remote control button operation can wake up the system and enter the normal working state. 2.3 Pairing instructions RemoteB037 Bluetooth device name: RemoteB037 2.3.1 Paired key combination

Pairing key combination: [OK] + [Volume -]

Unpairing key combination: [OK] + [Volume +]

2.3.2 Automatic pairing Press the voice button, the set-top box will pop up the pairing prompt interface;

7 / 25 Shenzhen Xeme Communication Co., Ltd

+- 3s Press the [OK] + [Volume -] buttons on the remote control at the same time for more than 3 seconds. When the remote control indicator flashes, release the pairing combination button;

The pairing prompt interface of the set-top box will display the current pairing status. After the pairing is successful, the prompt interface disappears;

2.3.3 Manual pairing steps launcher Boot the STB into the launcher interface. Use the remote control to open the set-top box setting interface, click Bluetooth settings to open the Bluetooth search button; or press the voice key to directly enter the pairing interface.

+- 3s Press the [OK] + [Volume -] buttons on the remote control at the same time for more than 3 seconds, when the remote control indicator flashes, release the pairing combination button. RemoteB037 8 / 25 Shenzhen Xeme Communication Co., Ltd Select the RemoteB037 device in the Bluetooth device list of the set-top box, click connect to complete the remote control pairing and binding. 2 When the remote control is successfully paired, the remote control indicator flashes slowly for 2 times and then goes out 2.3.4 Unpair

++ 3s Press [OK] + [Volume +] keys at the same time for more than 3 seconds to cancel Bluetooth pairing. 2.3.5 Report function OK+

Press [OK] + [Return] at the same time to provide the reporting function 2.3.6 Back-connection mechanism After the remote control and the set-top box are paired, when the remote control and the set-top box are disconnected from the Bluetooth connection state, each time you press a key, the remote control will send a loopback broadcast after sending the infrared key value code of the button. When the set-top box receives the response After the broadcast is connected, the remote control and the set-top 9 / 25 Shenzhen Xeme Communication Co., Ltd box re-establish the connection relationship and switch from infrared mode to Bluetooth mode. 2.4 Voice description 16KHz 16bit The remote control uses a microphone for voice collection, the sampling rate is 16KHz, the sampling accuracy is 16bit, and the sampling channel is mono;

The remote control establishes a Bluetooth connection with the built-in Bluetooth of the host;

google voice The sampled voice data is encoded using the google voice standard;

30s MIC The voice timeout is protected for 30s, the recording is forced to exit, and the box software can control the MIC to open and close;

MIC MIC APK Support the remote control MIC and other MIC (such as the recording key on the mobile phone APK) to alternate and switch voice input 10 / 25 Shenzhen Xeme Communication Co., Ltd 2.5 Indicator light description 2.5.1 Infrared mode 0.2s When the button is pressed, the red indicator light turns on for 0.2s and then goes out 2.5.2 Bluetooth mode 0.2s When the button is pressed, the blue indicator light is on, when the button is lifted, the indicator light is off 2.5.3 Pairing status 0.2s ON/OFF When entering the pairing state, the red indicator light flashes quickly (0.2s interval ON/OFF) 1s ;

When paired successful, the blue light flashes twice and then turns off for 1s;

When pairing timeout or pairing fails, the indicator light will go out directly 2.5.4 Recording status 11 / 25 Shenzhen Xeme Communication Co., Ltd When the remote control voice key is pressed and the recording is started, the blue indicator light is always on; when the voice key is released and the recording is stopped, the indicator light is off. 3 BOM No. category name specification quantity 1 2 3 4 5 6 7 8 9 0402 0R Chip resistor 0402 Chip resistance 0R SMT-0402 5% 0R (ROHS) 0402 Chip resistor 0402 100R Chip resistance SMT-0402 5% 100R (ROHS) 100R 0402 1K Chip resistor 0402 Chip resistance 1K SMT-0402 5% 1K (ROHS) 0402 Chip resistor 0402 0402 Chip resistor 0402 0402 Chip resistor 0402 0402 Chip resistor 0402 0805 Chip resistor 0805 2.2K Chip resistance SMT-0402 5% 2.2K (ROHS) 2.2K 4.7K Chip resistance SMT-0402 5% 4.7K (ROHS) 4.7K 10K Chip resistance SMT-0402 5% 10K (ROHS) 10K 20K Chip resistance SMT-0402 5% 20K (ROHS) 20K 2.2R Chip resistance SMT-0805 5% 2.2R (ROHS) 2.2R 0805 0R Chip resistor 0805 Chip resistance 0R 0402 0.5PF 10 Chip capacitors Chip capacitor 0402 0.5PF 0402 100NF 11 Chip capacitors Chip capacitor 0402 100NF SMT-0805 5% 0R (ROHS) SMT-0402 50V 5% 0.5pF NPO(ROHS) SMT-0402 10V 10% 100pF X7R(ROHS) 12 / 25 Component tag no. R1 R15 R5,R8,R10, R11,R18 R3, R4 R9 R6,R13 R16 R14 R2 C8 C10, C11,C15,C16,C20 1 1 5 2 1 2 1 1 1 1 5 Shenzhen Xeme Communication Co., Ltd 0402 470NF 12 Chip capacitors Chip capacitor 0402 470NF 0603 4.7UF 13 Chip capacitors Chip capacitor 0603 4.7UF SMT-0402 6.3V 10% 470NF X5R (ROHS) SMT-0402 6.3V 20% 4.7UF X5R (ROHS) 0402 14 Chip capacitors 0402 1UF SMT-0402 6.3V 20% 1UF X5R Chip capacitor 1UF

(ROHS) 0603 10UF 15 Chip capacitor Chip capacitor 0603 10UF 0805 22UF 16 Chip capacitor Chip capacitor 0805 22UF 0402 1.8Nh 17 High frequency High frequency inductor 0402 inductance 1.8nH 0402 2nH 18 High frequency High frequency inductor 0402 inductance 2nH SMT-0603 6.3V 10% 10UF X5R (ROHS) SMT-0805 6.3V 20% 22UF X5R(ROHS) SMT-0402 300MA 5% 1.8nH

(ROHS) SMT-0402 300MA 5% 2nH

(ROHS) 0805 Chip inductor 0805 10uH Chip inductor 10uH SMT-0805 400mA 5% 10uH

(ROHS) BT XM8620V2.1 XEME LOGO- XM8620V2.1 19 20 LED -1210 21 SMD LED lights-

1210 SMT-() 3.2x2.7mm (ROHS) LED SMT-red and blue double SMD LED lights color lamp (reverse taping) 4013 22 Electret Electret microphone microphone4013 package size: 3.2x2.7mm

(ROHS) SMT-4013

-42+/-3dB RL2.2K6 4.0 1.3mm SMT-4013 electret condenser microphone, sensitivity: -42+/-

3dB; RL2.2K; 6 pickup holes, size: 4.01.3mm SMT 32MHz10ppm 1 2 3 2 1 1 1 1 1 1 C19 C18, C17 C9, C13, C14 C5,C6 C2 C3 C7 L1 U1 D3 1 M2 23 Crystal 32M CL=9pF-20 Crystal 32M 70SMD3225 1 Y1 40 13 / 25 Shenzhen Xeme Communication Co., Ltd SMT 32MHz, 10ppm, CL=9pF; Operating temperature: -20 to 70;

Package: SMD3225; Internal resistance is less than or equal to 40 ohms SMT-S8050SOT-23 NPN MAK:J3YIC=0.5A SMT-S8050, package: SOT-23 NPN MAK: J3Y; IC=0.5A 24 SMD transistor NPN SMD transistor NPN BT-16 0.6mm/ 12H 25 Remote control Spring positive BT-

Nickel-plated steel 0.6mm/

spring 16 salt spray test 12H BT-16 0.6mm/ 12H 26 Remote control Spring negative Nickel-plated steel 0.6mm/

spring BT-16 salt spray test 12H 1 1 1 Q1 J1 J2 27 Infrared emission tube Remote control infrared emission tube DIP-LIRB20I413Z8 45 .3mm. 940nm DIP-LIRB20I413Z, 45 degrees 1 IR1 up, down, left and right at 8 meters. Plug-in 3mm. Wavelength 940nm XM-BT-16E 5 5mm,130g+/-20 28 Remote control XM-BT-16E pot 5 point waist 5mm,130g+/-

1 pot slice slices 20 XM20-XM-V4.0 FR-4 OSP 91.5X32X1.2mm 29 XM XM20-XM-K16E-

Model: XM20-XM-V4.2 XM solution V1.0 double-sided board, FR-4 1 board, green oil white lettering, carbon oil and OSP, size: 91.5X32X1.2mm 4 Performance specifications 4.1 Performance 10m 14 / 25 Shenzhen Xeme Communication Co., Ltd Voice support 10m use, there must be no voice call jam, loss, and remote control button freeze, lost code or continuous key issues, etc. 10M20ms. Infrared remote control distance 10M, response 20ms. 10M20ms2s. Bluetooth remote control distance 10M, response 20ms, wake-up connection response(Reconnect)2s. 3 The power consumption of the remote control can be used continuously for at least 3 months. 50 Pairing function: There is no problem that the Bluetooth device cannot be scanned or the pairing connection (including pressing the pairing key continuously for a short period of time) is not present, and there is no problem for more than 50 consecutive times. 2 50 Reconnection function: There is no problem of failure to reconnect, including the box power failure and reconnection, the remote control power failure reconnection, standing for 2 hours to reconnect, etc., no problem for more than 50 consecutive times. 15 / 25 Shenzhen Xeme Communication Co., Ltd 4.2 Microphone parameters No. Project Index requirements 1 2 3 4 5 6 Sensitivity Signal to Noise Ratio

-385dB (f=1KHz,Pin=1Pa) 58dB(94dB SPL@1KHz,A-weighted) Total Harmonic 1%(100dB SPL@1KHz) Distortion Sampling rate Frequency Response Dynamic Range 16K 300Hz-6kHz3dB 60dB 4.3 Electrical parameters No. 1 2 3 4 5 Project Operating temperature Storage temperature Relative humidity Operating Voltage Dynamic current (BLE) Index requirements

-20-55

-25-60 93%

2.2-3.6V 10mA Short press the button average current: less than 10mA 10mA Long press button average current: less than 16 / 25 Shenzhen Xeme Communication Co., Ltd 10mA 10mA Short press the voice button average current: less than 10mA 15mA Long press the voice button average current: less than 15mA 30mA Short press the button average current: less than 30mA 25mA Long press button average current: less than 25mA 65uA 8uA Bluetooth connection65uA Bluetooth disconnection8uA 94050nm 37. 90.6KHz 6 7 8 9 Dynamic current

(Infrared) Quiescent Current Infrared wavelength Infrared carrier frequency 10 Bluetooth operating 2400~2483.5MHz frequency 11 Bluetooth frequency 30KHz deviation 12 Bluetooth TX power

+4dBm 13 Receiving sensitivity

-92.5dBm

(typical)

(ESD) Electrostatic discharge(ESD) 14 4KV8KV Contact discharge 4KV, air discharge 8KV 17 / 25 Shenzhen Xeme Communication Co., Ltd 4.4 Reliability test No. Test items Testing equipment Detection method 1 High temperature storage test Constant temperature and humidity machine 0.7-1.0 603 24 0.7-1.0 2 The remote control is placed in a test box at room temperature without packaging and batteries, and then gradually heating up to 603C at an average rate of 0.7-

1.0C per minute, and then maintaining it for 24 hours, and then at 0.7-1.0C. The average rate of per minute is gradually reduced to the room temperature range, take out the remote control, and leave the remote control at room temperature for 2 hours, then test the functions and performance of the remote control; all functions and performance are required to be normal. 0.5-1.0

-253 24 0.5-1.0 2 2 Low temperature storage test The remote control should be placed in a test box at Constant room temperature without packaging and batteries (to temperature prevent condensation, it can be sealed with a plastic and humidity film). Then gradually cool down to -253C at an average machine rate of 0.5-1.0 C per minute, keep it for 24 hours, and then gradually rise to the room temperature range at an average rate of 0.5-1.0C per minute, take out the remote control, and place the remote control After leaving it at room temperature for 2 hours, test the functions and performance of the remote control; all functions and performance are required to be normal. 18 / 25 Shenzhen Xeme Communication Co., Ltd Constant Constant 3 temperature temperature and and humidity humidity machine storage test Constant 4 Temperature temperature change test and humidity machine 402

(93+2/-3)%, 96 0.5 75 3 0.5 2 The remote control is placed in a test chamber at room temperature. Then adjust the temperature to 402. After the temperature stabilizes, adjust the humidity to

(93+2/-3)% of the relative humidity, and leave it under this condition for 96 hours. At the end of the test, first reduce the relative humidity to 75%3% within 0.5 hours, then reduce the temperature to room temperature within 0.5 hours, take out the remote control, and after recovering for 2 hours, test the functions and performance of the remote control; The function and performance of the item are normal; (if there is water droplets or condensation on the remote control after the test, you should wait for it to disappear before testing). 10.5-253 3 10.2 602 3 10.2 5 The remote control is placed in a test box at room temperature without packaging and batteries. Then adjust the temperature to -253C at a rate of 10.5C per minute. After 3 hours of constant temperature, adjust the temperature to 602C at a rate of 10.2C per minute. After constant temperature for 3 hours, Adjust the temperature to room temperature at a rate of 10.2C per minute, the above is one cycle. Repeat 5 test cycles successively in the above manner. After the test, 19 / 25 Shenzhen Xeme Communication Co., Ltd 5 Salt spray Salt spray test test machine the functions and performance of the remote control were normal. (If there is water droplets or condensation on the remote control after the test, you should wait for it to disappear before testing).

()50.1 352, 47, 1KG/CM 8 Put the metal parts into the salt water concentration

(mass percentage) 5% 0.1%, the temperature of the test room Test for 8 hours in a test box with a temperature of 35C 2 C, a saturated air barrel temperature of 47C, and a spray air pressure of 1KG/CM. After the test is required, the metal parts shall be free of oxidation and rust. 1/4 10N 2min 6 Button reset test Dynamometer On the left and right ends of the remote control button about 1/4 of the position, and the left and right front and back of the button On the side, apply a force of 10N and press for 2 minutes. It is required that the tested key is not broken after the test, can be reset normally, and the key function is normal. Inspection icon:

310 50g 23550g 7 Press the button, when the remote control is working, Button load Dynamometer the pressing force of the conductive adhesive big four test direction button is 310 50g, other keys are 235 50g, judged by comprehensive hand feeling. 8 Key press Dynamometer 30N 3min In the center of the remote control key plane, apply a 20 / 25 Shenzhen Xeme Communication Co., Ltd strength test vertical pressure of 30N and press for 3 minutes; after the test is required, the keys should not be damaged and the keys function normally. 4.5 Remote control upgrade OTA Support OTA upgrade function. 5 Packing Specification 5.1 Label description 5.1.1 Warehouse label 30*5mm 80g SN The size of the label in the warehouse: 30*5mm 80g coated paper stickers, dumb film, black letters on a white background, affixed to the right side of the warehouse. The information is "product model and SN"

5.1.2 PE PE Bag label 30mm*5mm80g Remote control PE bag label: as shown in the figure below, 30mm*5mm;

21 / 25 Shenzhen Xeme Communication Co., Ltd 80g coated paper sticker, dumb film, affixed to the designated position of the battery compartment. The content is the fixed content of the icon. 5.1.3 SN SN Rule 16 1156111031200001. 12 =11() 345 6 =4 7 1=20212=20223=2023 89 01=1 02=2 03=3 1011 01=1 02=2 ..31=31 1213141516 00001 16-bit pure number, for example: 1156111031200001. No. 1 and 2: material category, remote control = 11 (fixed). The 3rd, 4th and 5th digits: the last three digits of the material code 6th digit: remote control code of material manufacturer, sago=4 (fixed) 7th place: Production time year 1=2021, 2=2022, 3=2023, and so on. 8th and 9th: Production month 01=January, 02=February, 03=March, 22 / 25 Shenzhen Xeme Communication Co., Ltd and so on. The 10th and 11th digits: production date 01=No. 1, No. 02=No. 2,..31=No. 31, and so on, this needs to be automatically generated according to the date 12, 13, 14, 15, 16: the serial number of each day, for example, the first product is 00001, which needs to be automatically generated, incremented in decimal, and cannot be repeated 5.2 Out box descriprion 4*3 7 140 The outer box contains 4*3 knife cards, each card hole is placed 7 remote controllers, a box has a total of 140 remote controllers. 5.2.1 Outer box size

:520300210mm, K=K Carton size: 520300210mm, material K=K 5.2.2 Out box label 100*150MM80g Outer box label size: 100*150MM, material: 80g coated paper sticker. The content is as follows:

23 / 25 Shenzhen Xeme Communication Co., Ltd Stick it on the obvious position of the outer box. 24 / 25 Shenzhen Xeme Communication Co., Ltd Federal Communications Commission Notice 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's 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.

-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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. 25 / 25

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Product specification Frequenc Range Antenna Type:

Gain (dBi) Input Impendence(ohm) 2400 ~ 2500MHz PCB Antenna 0.18 50 Polarization Type Vertical & Horizontal V.S .W.R

<1.4 All the technical data and information contained herein are subject to change without prior notice Antenna Size Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram 2400 MHz 2450 MHz 2500 MHz Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Peak Avg. Peak Avg. Peak Avg. Efficiency Module Board 0

-0.5 0. 18 -3.6 -0.11 -3.0 6 0.2 %

Shenzhen Xeme Communication Co., Ltd Date: 2022/09/14 Product Model Number: XM-BT-16 FCC ID: 2A4G4XM-BT-16 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:

Testing Approval applications and procedures is allowed to forward all information We declare that Shenzhen DL Testing Technology Co., Ltd. related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by Shenzhen DL Testing Technology Co., Ltd. on our behalf shall have the same effect as acts of our own. By:

Title: Supervisor Email: weixy@xemesmart.com Telephone: 13691665198 On behalf of: Wei XiaoYan

Shenzhen Xeme Communication Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject; Request for Confidentiality FCC ID: 2A4G4XM-BT-16 To Whom It May Concern, Date: September 15, 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 In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR 2.803 and the importation rules in Title 47 CFR 2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s);

External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. 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: Wei XiaoYan Title: Supervisor

Shenzhen Xeme Communication Co., Ltd Model Difference FCC ID: 2A4G4XM-BT-16 Model : XM-BT-16, B037, B037M, B037H

(All models have same circuits diagram, PCB Layout, construction and rated power, only different is the model name.) Sincerely, Clients signature:

Clients name & title: Wei XiaoYan / Supervisor Contact information /address: Room 302, Building 2, Jiuzhou Industrial Park, No. 10, No. 19 Road, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen