2A4RO-M19BTMini Bluetooth digital power amplifier

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. To assure continued compliance, any changes or modifications not expressly approved by the party. Responsible for compliance could void the user’s authority to operate this equipment. (Example- use only shielded interface cables when connecting to computer or peripheral devices). This equipment 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. FCC Radiation Exposure Statement: The equipment complies with FCC Radiation exposure limits set forth for uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

Shenzhen Amesra Technology Co., Ltd. 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-8-23 To whom it may concern: We, Shenzhen Amesra Technology Co., Ltd., hereby certify that the equipment for which authorization is sought (FCC ID: 2A4RO-M19BT) 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, {新申请人签名} Signature Heping Nie Manager Shenzhen Amesra Technology Co., Ltd. 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V03

Shenzhen Amesra Technology Co., Ltd. 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-8-23 U.S. Agent Designation Shenzhen Amesra 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: 2A4RO-M19BT): Name and company of U.S. agent: ACT Lab LLC Physical U.S. address of agent: 3280 East 59th Street Long Beach, CA 90805 United States FRN of U.S. agent: 0033465568 Email address of U.S. agent: [email protected] A CT Lab LLC acknowledges their obligation to accept service of process on behalf of Shenzhen Amesra Technology Co., Ltd.. Shenzhen Amesra Technology Co., Ltd. with the FRN [0031998818] 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). T he 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. Sincerely, {新申请人签名} Signature Heping Nie Manager Shenzhen Amesra Technology Co., Ltd. {代理商签名 } Signature Scott Huber Senior Technical Director ACT Lab LLC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

Shenzhen Amesra Technology Co., Ltd. Add: 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Date: 2024-8-23 FCC ID: 2A4RO-M19BT Dear Sir/Madam, We, Shenzhen Amesra Technology Co., Ltd. Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: Mini Bluetooth digital power amplifier Model no.: M19 BT, M19, G10D, G10D Pro, G12D, G12D Pro, G15D, G15D Pro, G16D, G16D Pro, G18D, G18D Pro, G20D, G20D Pro, G25D, G25D Pro, G28D, G28D Pro Sincerely, {新申请人签名} Name/Title： Heping Nie/Manager Company: Shenzhen Amesra Technology Co., Ltd. Address: 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Phone: 0755-23775262 Fax: 0755-23775262 E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2024-8-23> Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s 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 Model name 2A4RO-M19BT M19 BT For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s 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, {新申请人签名} Name/Title： Heping Nie/Manager Company: Shenzhen Amesra Technology Co., Ltd. Address: 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Phone: 0755-23775262 Fax: 0755-23775262 E-Mail: [email protected]

Shenzhen Amesra Technology Co., Ltd. 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-8-23 To whom it may concern: 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: 2A4RO-M19BT 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, {新申请人签名} Name/Title： Heping Nie/Manager Company: Shenzhen Amesra Technology Co., Ltd. Address: 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Phone: 0755-23775262 Fax: 0755-23775262 E-Mail: [email protected]

FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Appendix III EUT External Photographs Photo 1 Appearance of EUT Photo 2 Appearance of EUT FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Photo 3 Appearance of EUT Photo 4 Appearance of EUT FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Photo 5 Appearance of EUT Photo 6 Appearance of EUT FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Photo 7 Adapter appearance

FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Appendix I Label Appendix II Label Location FCC ID: 2A4RO-M19BT Model：M19 BT

FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Appendix IV EUT Internal Photographs Photo 8 Internal of EUT Photo 9 Appearance of PCB BT Antenna FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Photo 10 Appearance of PCB

Shenzhen Toby Technology Co., Ltd. Report No.: TBR-C-202407-0104-3 Page: 1 of 3 TB-RF-074-1.0 1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China Tel: +86 75526509301 Fax: +86 75526509195 Maximum Permissible Exposure Evaluation FCC ID: 2A4RO-M19BT 1. Client Information Applicant : Shenzhen Amesra Technology Co., Ltd. Address : 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China Manufacturer : Shenzhen Amesra Technology Co., Ltd. Address : 401, Aohua Business Building, No.148 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen,China 2. General Description of EUT EUT Name : Mini Bluetooth digital power amplifier Models No. : M19 BT, M19, G10D, G10D Pro, G12D, G12D Pro, G15D, G15D Pro, G16D, G16D Pro, G18D, G18D Pro, G20D, G20D Pro, G25D, G25D Pro, G28D, G28D Pro Model Different : All these models are identical in the same PCB, layout and electrical circuit, The only difference is model name, brand name and product name. Brand Name : N/A Sample ID : HC-C-202407-0104-02-01 Product Description : Operation Frequency: Bluetooth(BR+EDR): 2402MHz~2480MHz Power Rating : Adapter:(MX120Z-24005000) Input: 100-240V~, 50/60Hz 2.5A Output: 24.0V⎓5.0A 120.0W Software Version : V1.0 Hardware Version : M19 BT-V3.0 Remark : The antenna gain provided by the manufacturer, the verified for the RF conduction test provided by TOBY test lab. Report No.: TBR-C-202407-0104-3 Page: 2 of 3 TB-RF-074-1.0 Method of Measurement for FCC 1. Max. Antenna Gain: Mode Antenna Type Antenna Gain(dBi) Bluetooth Copper Tube Antenna 2.0 2. EUT Operation Condition: Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. 3. Exposure Evaluation: Equation from page 18 of OET Bulletin 65, Edition 97-01 S=(PG)/4πR 2 Where S: power density P: power input to the antenna G: power gain of the antenna in the direction of interest relative to an isotropic radiator. R: distance to the center of radiation of the antenna Simultaneous transmission MPE Considerations According to KDB447498: All transmitters and antennas in the host must be either evaluated for MPE compliance, by measurement or computational modeling, or qualify for the standalone MPE test exclusion in section 7.1. Simultaneous transmission MPE test exclusion applies when the sum of the MPE ratios for all simultaneous transmitting antennas incorporated in a host device, based on the calculated/estimated, numerically modeled or measured field strengths or power density, is ≤ 1.0. This means that: ∑ of MPE ratios ≤ 1.0 Report No.: TBR-C-202407-0104-3 Page: 3 of 3 TB-RF-074-1.0 4. Test Result: Worst MPE Result Test Mode Frequency (MHz) Conducted Power(max) (dBm) Turn-up Power (dB) Max tune up power (dBm) [P] Max. ANT Gain (dBi) [G] Distance (cm) [R] Power Density (mW/ cm 2 ) [S] BT 1M 2402 4.12 4±1 5 2.0 20 0.00100 2441 0.352 0±1 1 2.0 20 0.00040 2480 -1.165 -1±1 0 2.0 20 0.00032 BT 2M 2402 4.268 4±1 5 2.0 20 0.00100 2441 2.506 2±1 3 2.0 20 0.00063 2480 -0.925 0±1 1 2.0 20 0.00040 BT 3M 2402 4.961 4±1 5 2.0 20 0.00100 2441 3.118 3±1 4 2.0 20 0.00079 2480 -0.47 0±1 0 2.0 20 0.00032 Note: The antenna gain used max. antenna gain 5. Conclusion: As specified in Table 1B of 47 CFR 1.1310- Limits for Maximum Permissible Exposure (MPE), Limits for General Population/ Uncontrolled Exposure Frequency Range (MHz) Power density (mW/ cm 2 ) 300-1,500 F/1500 1,500-100,000 1.0 For: 2402~2480MHz MPE limit S: 1mW/ cm 2 The MPE is calculated as 0.001mW / cm 2 < limit 1mW / cm 2 . So, RF exposure limit warning or SAR test are not required. The EUT will only be used with a separation of 20cm or greater between the antenna and nearby persons and can therefore be considered a mobile transmitter per 47 CFR2.1091 (b). The RF Exposure Information page from the manual is included here for reference. -----END OF REPORT-----

2 five six Serial number date cause Confirming person A B A C A φ7.6 2.0 B H| CC D29.0 D 7 HX-RG-78U wire rod RG178 L=85.00mm one part name Small s antenna 2.4G 2DB product name Small s antenna 2.4G 2DB sixHX-AN0104-05 brass Brass 04.5*23mm one five SMA260-ZG8MRANT SMA male pin Copper is black. one Part item number HX-A04-WIFI Product item number HX-A04-WIFI.dwg four HX-AN01-1213ZPositioning column Black zinc plating on copper one scalingNONE unit mm E threeHX-AN57-01 Connecting cylinder PA-6 black one E 2 HX-AN57-02 connector PA-6 black one Approver reviewer mapper Dimensional tolerance Rev. oneHX-AN57-03 Plastic body TPE black 1 Chen Hui x. Shi 0.5 No.Part NumberName Material Q'ty 2023-6-3 2threefour five six seven x.x ±0.1 X.xx main 0.05 A x Shi 1 lndex: 1.Reliability Testing 2.Specification 3.S Parameter Test Data 4.Antenna Radiation Pattern 1.Reliability Testing Test Item Procedure Requirement 1.Visual inspectionApplicable methods follow specification and Dimension using x5 Check magnification 2. Rapid Changing -40°(30minutes)to°C After 2 hours recovery: of Temperature 80°(30minutes);°C1.no visible damage 24 cycles 2.bandwidth tolerance <±5% 3. Damp Heat 24 hours at 60°C; After 2 hours recovery: 90~95%RH 1.no visible damage 2.bandwidth tolerance < ±5% 4. Endurance 24 hours at 80°C After 2 hours recovery: 1.no visible damage 2.bandwidth tolerance <±5% 5. Connector Pull >=1.0 Kg Hold 2~3S: Strength Test 1.no visible damage 2.bandwidth tolerance <±5% 2.Specification A. Electrical Characteristics S.W.R.(Tested in PC) Typical Antenna Gain lmpedance B.Material Material of Radiator Connector Type Material of Coaxial Cable C.Environmental Operation Temperature Storage Temperature <=2.0 @ 2.0dBi 50 Ohm 2400~2500 MHz CU SMA RG-178 mm 30~+85°C°C -30~+85°C°C 3.S.W.R.Testing Result 1 Active ChjTrace2 Response3 Stimulus4 MkrjAnalysis5 Instr State Tr1 S44 Log Mag 10.0OdB/Ref 0.000dB 50.00 40.00 Trigger on e 2 >3 2.4000000 2.4500000 2.5000000 GH z GH z GH z 15.172 23.316 17.544 dB dB dB 30.00 20.00 Hold 10.00 0.000 10.00 Single t h r e e o n e 20.00 Continuous 30.00 2 40.00 50.00 Hold All Channels pri va te pri va te TrZS44 SWR500.Om/Ref 1.000 Continuous Disp Channels Trigger Source Internal Trigger Event On Sweep Restart 2 Trigger 1.500 1.000| 1 Start 2 GHz L o s e 4 IFBW 70 kHz Stop 3 GHz Off 6.000 one2.4000000GHz1.4223 5.500 22.4500000GHz1.1465 >32.5000000GHz1.3059 5.000 4.500 4 000 3.500 3.000 2.500 2.000 4.Antenna Radiation Pattern Testing Equipment Specification: Antenna Anechoic Chamber Dimension:8 x 4 x 4 m Quite Zone:600mm lsolation:>100dB @1 GHz @1MHz~10 GHz Testing Equipment:Agilent 5071B Received Antenna:0.7~6.0 GHz for Gain Calibration Double Ridged Horn Antenna DUT STD gain antenna Turn table Portl Port2 3D radiation pattern diagram XY-planeXZ-planeYZ-plane

Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 1 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 RF Test Data for Bluetooth (Conducted Measurements) General Description of EUT Product Name: Mini Bluetooth digital power amplifier Test Model: M19 BT Sample ID: HC-C-202407-0104-02-01 Environmental Conditions Temperature: 24.6°C Relative Humidity: 52.1% Test Voltage: DC 5V Test Engineer: Mike Yan Note: For a more detailed features description, please refer to the report TBR-C-202407-0104-1 The report only show the worst case data. Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 2 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Contents 1. Duty Cycle ........................................................................................................................................................................................... 3 2. Maximum Conducted Output Power ................................................................................................................................................. 9 3. -20dB Bandwidth .............................................................................................................................................................................. 18 4. Occupied Channel Bandwidth ......................................................................................................................................................... 24 5. Band Edge ........................................................................................................................................................................................ 30 6. Band Edge(Hopping) ........................................................................................................................................................................ 37 7. Conducted RF Spurious Emission .................................................................................................................................................. 44 8. Restrict Band .................................................................................................................................................................................... 54 9. Carrier Frequencies Separation....................................................................................................................................................... 61 10. Number of Hopping Channel ......................................................................................................................................................... 64 11. Dwell Time ....................................................................................................................................................................................... 67 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 3 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 1. Duty Cycle Condition Mode Frequency (MHz) Antenna Duty Cycle (%) Correction Factor (dB) 1/T (kHz) NVNT 1-DH1 2402 Ant1 30.4 5.17 2.63 NVNT 1-DH1 2441 Ant1 30.4 5.17 2.63 NVNT 1-DH1 2480 Ant1 30.4 5.17 2.63 NVNT 2-DH1 2402 Ant1 30.4 5.17 2.63 NVNT 2-DH1 2441 Ant1 31.2 5.06 2.56 NVNT 2-DH1 2480 Ant1 31.2 5.06 2.56 NVNT 3-DH1 2402 Ant1 31.2 5.06 2.56 NVNT 3-DH1 2441 Ant1 31.2 5.06 2.56 NVNT 3-DH1 2480 Ant1 31.2 5.06 2.56 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 4 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Test Graphs Duty Cycle NVNT 1-DH1 2402MHz Ant1 Duty Cycle NVNT 1-DH1 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 5 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Duty Cycle NVNT 1-DH1 2480MHz Ant1 Duty Cycle NVNT 2-DH1 2402MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 6 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Duty Cycle NVNT 2-DH1 2441MHz Ant1 Duty Cycle NVNT 2-DH1 2480MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 7 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Duty Cycle NVNT 3-DH1 2402MHz Ant1 Duty Cycle NVNT 3-DH1 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 8 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Duty Cycle NVNT 3-DH1 2480MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202407-0104-1 Page: 9 of 72 FCC ID: 2A4RO-M19BT TB-RF-074-1.0 2. Maximum Conducted Output Power Condition Mode Frequency (MHz) Antenna Total Power (dBm) Limit (dBm) Verdict NVNT 1-DH1 2402 Ant1 4.12 21 Pass NVNT 1-DH1 2441 Ant1 0.352 21 Pass NVNT 1-DH1 2480 Ant1 -1.165 21 Pass NVNT 1-DH3 2441 Ant1 2.999 21 Pass NVNT 1-DH5 2441 Ant1 2.892 21 Pass NVNT 2-DH1 2402 Ant1 4.268 21 Pass NVNT 2-DH1 2441 Ant1 2.506 21 Pass NVNT 2-DH1 2480 Ant1 -0.925 21 Pass NVNT 2-DH3 2441 Ant1 2.93…

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Shenzhen Toby Technology Co., Ltd. Report No.: TBR-C-202407-0104-1 Page: 1 of 43 TB-RF-074-1.0 1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China Tel: +86 75526509301 Fax: +86 75526509195 Radio Test Report FCC ID: 2A4RO-M19BT Report No. : TBR-C-202407-0104-1 Applicant : Shenzhen Amesra Technology Co., Ltd. Equipment Under Test (EUT) EUT Name : Mini Bluetooth digital power amplifier Model No. : M19 BT Series Model No. : M19, G10D, G10D Pro, G12D, G12D Pro, G15D, G15D Pro, G16D, G16D Pro, G18D, G18D Pro, G20D, G20D Pro, G25D, G25D Pro, G28D, G28D Pro Brand Name : N/A Sample ID : HC-C-202407-0104-01-01&HC-C-202407-0104-02-01 Receipt Date : 2024-07-31 Test Date : 2024-07-31 to 2024-08-23 Issue Date : 2024-08-23 Standards : FCC Part 15 Subpart C 15.247 Test Method : ANSI C63.10: 2013 KDB 558074 D01 15.247 Meas Guidance v05r02 Conclusions : PASS In the configuration tested, the EUT complied with the standards specified above. Test By : Mike Yan Reviewed By : Henry Huang Approved By : Ivan Su This report details the results of the testing carried out on one sample. The results contained in this test report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in the report. Report No.: TBR-C-202407-0104-1 Page: 2 of 43 TB-RF-074-1.0 Contents CONTENTS ............................................................................................................................................ 2 1. GENERAL INFORMATION ABOUT EUT ............................................................................. 5 1.1 Client Information ................................................................................................................ 5 1.2 General Description of EUT (Equipment Under Test) ................................................... 5 1.3 Block Diagram Showing the Configuration of System Tested ...................................... 6 1.4 Description of Support Units .............................................................................................. 7 1.5 Description of Test Mode ................................................................................................... 7 1.6 Description of Test Software Setting ................................................................................ 8 1.7 Measurement Uncertainty .................................................................................................. 8 1.8 Test Facility........................................................................................................................... 9 2. TEST SUMMARY..................................................................................................................... 10 3. TEST SOFTWARE .................................................................................................................. 10 4. TEST EQUIPMENT AND TEST SITE .................................................................................. 11 5. CONDUCTED EMISSION ...................................................................................................... 12 5.1 Test Standard and Limit ................................................................................................... 12 5.2 Test Setup........................................................................................................................... 12 5.3 Test Procedure .................................................................................................................. 12 5.4 Deviation From Test Standard......................................................................................... 12 5.5 EUT Operating Mode ........................................................................................................ 13 5.6 Test Data............................................................................................................................. 13 6. RADIATED AND CONDUCTED UNWANTED EMISSIONS ............................................ 14 6.1 Test Standard and Limit ................................................................................................... 14 6.2 Test Setup........................................................................................................................... 15 6.3 Test Procedure .................................................................................................................. 16 6.4 Deviation From Test Standard......................................................................................... 17 6.5 EUT Operating Mode ........................................................................................................ 17 6.6 Test Data............................................................................................................................. 17 7. RESTRICTED BANDS AND BAND EDGE REQUIREMENT .......................................... 18 7.1 Test Standard and Limit ................................................................................................... 18 7.2 Test Setup........................................................................................................................... 18 7.3 Test Procedure .................................................................................................................. 19 7.4 Deviation From Test Standard......................................................................................... 19 7.5 EUT Operating Mode ........................................................................................................ 19 7.6 Test Data............................................................................................................................. 19 8. 99% OCCUPIED AND 20DB BANDWIDTH ....................................................................... 20 8.1 Test Standard and Limit .....................................…

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FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Appendix V EUT Test Photographs Photo of Setup for Conducted Emission(AC POWER) Photo of Setup for Radiated Emission (30MHz~1GHz) FCC ID: 2A4RO-M19BT TB-RF-074-1.0 Photo of Setup for Radiated Emission (Above 1 GHz) -----END OF REPORT-----