2AD9E-MM55HRMediaMaster Source Unit Hidden Receiver

JL Audio, Inc. Covered Equipment Certification Attestation Letter Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID:2AD9E-MM55HR JL Audio, Inc. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. JL Audio, Inc. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Signed: Printed name: Mitchell Phillipi Title: Sr. Manager, WW Compliance Company Name: JL Audio, Inc. Address: 10369 North Commerce Pkwy, Miramar, Florida 33025-3962, United States Phone: 4255036576 E-Mail: [email protected] Date: 2024-04-24

JL Audio, Inc. JL Audio, Inc. 10369 North Commerce Pkwy, Miramar, Florida 33025-3962, United States, Miramar, Florida 33025-3962, United States Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Attestation Statement according to 2.911(d)(7) FCC ID: 2AD9E-MM55HR TO WHOM IT MAY CONCERN: We, JL Audio, Inc. designate ourselves to act as U.S. agent for service of process. JL Audio, Inc. hereby acknowledges the obligation of the U.S. agent for service of process. Further JL Audio, Inc. accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission- related proceeding involving the equipment. Sincerely Signature: Company name: JL Audio, Inc. FRN: 0012294716 Address: 10369 North Commerce Pkwy, Miramar, Florida 33025-3962, United States Contact Person: Mitchell Phillipi Telephone No: 4255036576 Email: [email protected]

JL Audio, Inc. Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Damon Hu, Gongdong Dongdian Testing Service Co.,Ltd.(Unit 2,Building 1,No.17,Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808), to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti- Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: Mitchell Phillipi Title: Sr. Manager, WW Compliance Company Name: JL Audio, Inc. Address: 10369 North Commerce Pkwy, Miramar, Florida 33025-3962, United States Phone: 4255036576 E-Mail: [email protected] Date: 2024-04-24

JL Audio, Inc. Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 REQUEST FOR CONFIDENTIALITY – FCC FCC ID: 2AD9E-MM55HR Pursuant to Sections 0.457(d) and 0.459 of the Commission’s Rules and FCC Guidance document 726920, we hereby request permanent confidential treatment of exhibits identified as such in the table below and request they are permanently withheld from public review based on the documents containing trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. We also request short-term confidentiality on certain exhibits until the intended date of marketing as outlined below. We request the exhibits be withheld from public view for a period of 180 days (cannot exceed 180 days) days. We attest marketing of the product will only commence after the period of short-term confidentiality expires, or if marketing is to commence before the requested number of days listed above, the grantee will inform Nemko to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. Exhibit Type of Confidentiality Requested Block Diagrams ☒ Permanent ☐ Short Term External Photos ------------------ ☒ Short Term Internal Photos ☐ Permanent* ☒ Short Term Operation Description ☒ Permanent ☐ Short Term Parts List & Placement/BOM ☐ Permanent ☐ Short Term Tune-Up Procedure ☐ Permanent ☐ Short Term Schematic Diagrams ☒ Permanent ☐ Short Term Test Setup Photos ------------------ ☒ Short Term User’s Manual ☐ Permanent* ☒ Short Term The asterisked items (*) require further information to be provided in this justification letter before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. Note: any documents held under the Short-Term confidentiality will automatically become public after the requested time if an appropriate extension request has not been received. Any exhibits (i.e., schematic diagrams) that may have already been requested to have “Permanent” confidentiality as shown above need not be repeated under Short-Term confidentiality request. Sincerely, Signed: Printed name: Mitchell Phillipi Title: Sr. Manager, WW Compliance Company Name: JL Audio, Inc. Address: 10369 North Commerce Pkwy, Miramar, Florida 33025-3962, United States Phone: 4255036576 E-Mail: [email protected] Date: 2024-04-24

JL Audio, Inc. Product Similarity Declaration Product name: MediaMaster Source Unit Hidden Receiver Model name: MM55-HR FCC ID： 2AD9E-MM55HR We (JL Audio, Inc.) hereby state that all the models are electrical identical including the same hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure, the difference are packing box and accessories. Model Picture Description MM55-HR 1. Color Giftbox packing Included “Power and speaker mating hardness” O-MM55-HR 1. White box packing 2. Without Included “Power and speaker mating hardness” Signature: Name: Mitchell Phillipi Title: Sr. Manager, WW Compliance Place United States, date :2024-04-24

MM55-HR O-MM55-HR MM55-HR Updated Model Label: Update on 2024/6/17 Bottom center

深圳市南斗星科技有限公司 SHENZHEN SOUTH STAR TECHNOLOGY CO.,LTD QP-21-B01/A2 承 认 书 APPROVAL SHEET 客户名称Customer Name 采升（AR Electronics Co., Ltd.） 产品型号Product Model AWP0858 客户料号Customer P/N 规格描述Specifications 2.4G内置天线,4dBi,1.13黑色板边出线长L=100mm 南斗星料号Southstar P/N 3.N101.1173 制作日期Production date 2023.08.17 制作版本Revision 1.0 南斗星（Southstar） 编制（FICTION）品质（DQE）研发（R&D） 客户（ Customer ） 采 购（ PUR ） 品质（ QC ） 研发（ R&D ） 制造厂商：深圳市南斗星科技有限公司（ShenzhenSouthernStartechnologyCo.,LTD） 办公地址：深圳市宝安区福海街道新和社区宝安大道 6099 号星港同创汇天枢座 803 803,TianshuBlock, XinggangTongchuanghui,6099BaoanAvenue, XinheCommunity, FuhaiStreet,BaoanDistrict,Shenzhen 制造地址：广东省东莞市虎门镇赤岗南坊一路 3 号 No. 3, ChigangNanfang1st Road,HumenTown,DongguanCity,GuangdongProvince 电 话：0755-27474071 0769-88086190 网 址：//www.southstar-tech.com 样品封订 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 承认书变更履历 版本日期变更描述备注 1.02023.08.17初版 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 目录 Index 一、封面（Cover）··························1 二、版本记录（Colophon）·······················2 三、目录（Index）··························3 四、基本参数（Thebasicparameters）·················4 五、工程图纸（ProductDrawing）···················5 六、测试设备（TestEquipment&Conditions）·············6 七、测试报告（TestReport）····················7-8 八、天线装配图片（Antennaassemblypicture）·············9 九、包装方式（Packingmethod）····················10 深圳市南斗星科技有限公司 SHENZHENSOUTHSTAR TECHNOLOGYCO.,LTD QP-21-B01/A2 基本参数(The basicparameters)： A.电性能ElectricalCharacteristics Frequency频率 VSWR电压驻波比 Efficiency效率 Impedance阻抗 Polarization极化 Gain增益 Note备注： 2400MHz~2500MHz ≤2 72.54%@2450MHz 50 Ohm Linear 4.46dBi@2450MHz B.材料 &物理性能Material& MechanicalCharacteristics 射频材料Materialof RadiatorPCB 射频线类型CableType1. 13mmblack 接头类型ConnectorType一代 C.环境Environmental 工作温度OperationTemperature-30°C~+65 °C 存放温度StorageTemperature-40°C~+70 °C 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 测试设备(TestEquipment&Conditions): 1.网络分析仪NetWorkAnalyzers: KeysightE5071C 2.综合测试仪Comprehensivetester： CMW500、MT8000A、MT8862A 3.3D暗室测试系统3DChamberTestSystem: 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 天线阻抗(AntennaImpedance):S11 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 效率&增益(Efficiency&Gain)： 天线3D&2D方向图(Antenna3D&2Dpattern)： 深圳市南斗星科技有限公司 SHENZHENSOUTHSTARTECHNOLOGYCO.,LTD QP-21-B01/A2 天线装配图片(Antennaassemblypicture)：

Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 1 of 8 RF EXPOSURE REPORT Applicant : JL Audio, Inc. Address of Applicant : 10369 North Commerce Parkway, Miramar, FL 33025- 3962 Manufacturer : JL Audio, Inc. Address of Manufacturer : 10369 North Commerce Parkway, Miramar, FL 33025- 3962 Equipment under Test : MediaMaster Source Unit Hidden Receiver Model No. : MM55-HR, O-MM55-HR FCC ID : 2AD9E-MM55HR Test Standard(s) : KDB447498 D01 General RF Exposure Guidance v06 Report No. : DDT-RE24022128-1E03 Issue Date : 2024/04/15 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 2 of 8 Table of Contents 1. General Test Information .............................................................................................. 5 1.1. Description of EUT ........................................................................................................ 5 1.2. Accessories of EUT ...................................................................................................... 5 1.3. Test laboratory .............................................................................................................. 5 2. RF Exposure Evaluation ............................................................................................... 6 2.1. Requirement ................................................................................................................. 6 2.2. Calculation method ....................................................................................................... 6 2.3. Estimation result ........................................................................................................... 7 3. Photos of the EUT ........................................................................................................ 8 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 3 of 8 Test Report Declare Applicant : JL Audio, Inc. Address of Applicant : 10369 North Commerce Parkway, Miramar, FL 33025-3962 Equipment under Test : MediaMaster Source Unit Hidden Receiver Model No. : MM55-HR, O-MM55-HR Manufacturer : JL Audio, Inc. Address of Manufacturer : 10369 North Commerce Parkway, Miramar, FL 33025-3962 Test Standard Used: KDB447498 D01 General RF Exposure Guidance v06 We Declare: The equipment described above is tested by Guangdong Dongdian Testing Service Co., Ltd. and in the configuration tested the equipment complied with the standards specified above. The test results are contained in this test report and Guangdong Dongdian Testing Service Co., Ltd. is assumed of full responsibility for the accuracy and completeness of these tests. After evaluation, our opinion is that the equipment In Accordance with above standard. Report No.: DDT-RE24022128-1E03 Date of Receipt: 2024/03/12 Date of Test: 2024/03/12~2024/04/11 Prepared By: Approved By: ____________________ ______________________ Jacky Huang/Engineer Damon Hu/EMC Manager Note: This report applies to above tested sample only. This report shall not be reproduced in parts without written approval of Guangdong Dongdian Testing Service Co., Ltd. Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 4 of 8 Revision History Rev. Revisions Issue Date Revised By --- Initial issue 2024/04/15 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 5 of 8 1. General Test Information 1.1. Description of EUT EUT Name : MediaMaster Source Unit Hidden Receiver Model Number : MM55-HR, O-MM55-HR Difference of model number : The product circuit design, layout, components used and internal wiring are the same, only the model name, packing box and accessories are different. We chose the model " MM55-HR " as a representative model for compliance testing. EUT Function Description : Please reference user manual of this device Power Supply : DC 14.4V Radio Specification : Bluetooth BR/EDR/LE Operation Frequency : 2402 MHz-2480 MHz Modulation : GFSK, /4-DQPSK, 8DPSK Antenna : FPC antenna, max peak gain: 4.69 dBi Note: The above EUT information is declared by manufacturer and for more detailed features description please refer to the manufacturer's specifications or User's Manual. The above Antenna information is declared by manufacturer and for more detailed features description please refer to the manufacturer's specifications, the laboratory shall not be held responsible. 1.2. Accessories of EUT Accessories Manufacturer Model number Description DC Cable N/A N/A Length: 18cm Load line N/A N/A Length: 60cm 1.3. Test laboratory Guangdong Dongdian Testing Service Co., Ltd. Add.: Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808. Tel.: +86-0769-38826678, http://www.dgddt.com, Email: [email protected]. CNAS Accreditation No. L6451; A2LA Accreditation Number: 3870.01 FCC Designation Number: CN1182, Test Firm Registration Number: 540522 Innovation, Science and Economic Development Canada Site Registration Number: 10288A Conformity Assessment Body identifier: CN0048 VCCI facility registration number: C-20087, T-20088, R-20123, R-20155, G-20118 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E03 TRF No.: RT-4-E-02-015 FCC RF Exposure Report MPE Ver.1.1 Page 6 of 8 2. RF EXPOSURE EVALUATION 2.1. Requirement Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’…

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Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 1 of 98 FCC CERTIFICATION TEST REPORT Applicant : JL Audio, Inc. Address of Applicant : 10369 North Commerce Parkway, Miramar, FL 33025- 3962 Manufacturer : JL Audio, Inc. Address of Manufacturer : 10369 North Commerce Parkway, Miramar, FL 33025- 3962 Equipment under Test : MediaMaster Source Unit Hidden Receiver Model No. : MM55-HR, O-MM55-HR FCC ID : 2AD9E-MM55HR Test Standard(s) : FCC Rules and Regulations Part 15 Subpart C, ANSI C63.10:2020 Report No. : DDT-RE24022128-1E01 Issue Date : 2024/04/15 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 2 of 98 Table of Contents 1. Summary of Test Results ............................................................................................. 7 2. General Test Information .............................................................................................. 8 2.1. Description of EUT ........................................................................................................ 8 2.2. Accessories of EUT ...................................................................................................... 9 2.3. Block diagram of EUT configuration for test ................................................................. 9 2.4. Decision of final test mode ........................................................................................... 9 2.5. Deviations of test standard ......................................................................................... 10 2.6. Test environment conditions ....................................................................................... 10 2.7. Test laboratory ............................................................................................................ 10 2.8. Measurement uncertainty ........................................................................................... 11 3. Equipment Used During Conductive Test .................................................................. 12 4. 20 dB Bandwidth ......................................................................................................... 13 4.1. Block diagram of test setup ........................................................................................ 13 4.2. Limits ........................................................................................................................... 13 4.3. Test procedure ............................................................................................................ 13 4.4. Test result ................................................................................................................... 14 4.5. Test graphs ................................................................................................................. 15 5. 99% Bandwidth ........................................................................................................... 18 5.1. Block diagram of test setup ........................................................................................ 18 5.2. Limits ........................................................................................................................... 18 5.3. Test procedure ............................................................................................................ 18 5.4. Test result ................................................................................................................... 19 5.5. Test graphs ................................................................................................................. 20 6. Maximum Peak Output Power .................................................................................... 23 6.1. Block diagram of test setup ........................................................................................ 23 6.2. Limits ........................................................................................................................... 23 6.3. Test procedure ............................................................................................................ 23 6.4. Test result ................................................................................................................... 24 6.5. Test graphs ................................................................................................................. 25 7. Carrier Frequency Separation .................................................................................... 28 7.1. Block diagram of test setup ........................................................................................ 28 7.2. Limits ........................................................................................................................... 28 7.3. Test procedure ............................................................................................................ 28 7.4. Test result ................................................................................................................... 29 7.5. Test graphs ................................................................................................................. 30 8. Dwell Time .................................................................................................................. 31 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 3 of 98 8.1. Block diagram of test setup ........................................................................................ 31 8.2. Limits .........................................................................................................................…

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Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 48 of 98 11. RF Conducted Spurious Emissions 11.1. Block diagram of test setup 11.2. Limits In any 100 kHz bandwidth outside the frequency bands in which the spread spectrum intentional radiator in operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power. 11.3. Test procedure (1) Connect EUT’s antenna output to spectrum analyzer by RF cable. (2) Establish a reference level by using the following procedure: Center frequency Test frequency RBW: 100 kHz VBW: 300 kHz Span Wide enough to capture the peak level of the in-band emission Detector Mode: Peak Sweep time: Auto Trace mode Max hold (3) Allow the trace to stabilize, use the peak marker function to determine the maximum peak power level to establish the reference level. (4) Set the spectrum analyzer as follows: RBW: 100 kHz VBW: 300 kHz Span Encompass frequency range to be measured Number of measurement points ≥Span/RBW Detector Mode: Peak Sweep time: Auto Trace mode Max hold (5) Allow the trace to stabilize, use the peak marker function to determine the maximum amplitude of all unwanted emissions outside of the authorized frequency band. Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 49 of 98 11.4. Test result Test Engineer: Zhongyao Test Site: RF Measurement System 3# Ambient Condition: 23.6°C, 49.0%RH Test Date: 2024.03.22 Test Power Supply: DC 14.4V Sample Number: S24022128-006 Mode Frequency (MHz) Verdict DH5 Hopping off 2402 Pass Hopping off 2441 Pass Hopping off 2480 Pass 2DH5 Hopping off 2402 Pass Hopping off 2441 Pass Hopping off 2480 Pass 3DH5 Hopping off 2402 Pass Hopping off 2441 Pass Hopping off 2480 Pass Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 50 of 98 11.5. Test graphs DH5_Ant1_2402_0~Reference DH5_Ant1_2402_30~1000 DH5_Ant1_2402_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 51 of 98 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 DH5_Ant1_2441_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 52 of 98 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 DH5_Ant1_2480_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 53 of 98 2DH5_Ant1_2402_0~Reference 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 54 of 98 2DH5_Ant1_2441_0~Reference 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 55 of 98 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 56 of 98 3DH5_Ant1_2402_0~Reference 3DH5_Ant1_2402_30~1000 3DH5_Ant1_2402_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 57 of 98 3DH5_Ant1_2441_0~Reference 3DH5_Ant1_2441_30~1000 3DH5_Ant1_2441_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 58 of 98 3DH5_Ant1_2480_0~Reference 3DH5_Ant1_2480_30~1000 3DH5_Ant1_2480_1000~26500 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 59 of 98 12. Duty cycle 12.1. Block diagram of test setup 12.2. Limit Just for Report. 12.3. Test procedure (1) Connected the EUT’s antenna port to the Spectrum Analyzer by suitable attenuator, The cable loss and attenuator loss have been put into spectrum analyzer as amplitude offset. set the Spectrum Analyzer as below: Centre Frequency: The centre frequency of the middle hopping channel. Resolution BW: 10 MHz. Video BW: 10 MHz. Span: Zero span. Detector: Peak. Trace Mode: Clear Write. Sweep: Video Trigger (2) When the trace is complete, measure the sending time of 1 burst and the duty cycle of 1 burst cycle. (3) Calculate dwell time follow below formula: Duty cycle= Pulse’s on time / Burst cycle Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 60 of 98 12.4. Test result Test Engineer: Zhongyao Test Site: RF Measurement System 3# Ambient Condition: 23.6°C, 49.0%RH Test Date: 2024.03.22 Test Power Supply: DC 14.4V Sample Number: S24022128-006 Test Mode Antenna Frequency [MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor [dB] DH5 Ant1 2402 2.89 3.75 77.07 1.13 2441 2.90 3.76 77.13 1.13 2480 2.90 3.76 77.13 1.13 2DH5 Ant1 2402 2.90 3.76 77.13 1.13 2441 2.89 3.75 77.07 1.13 2480 2.89 3.75 77.07 1.13 3DH5 Ant1 2402 2.89 3.75 77.07 1.13 2441 2.90 3.75 77.33 1.12 2480 2.89 3.75 77.07 1.13 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 61 of 98 12.5. Test graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 62 of 98 2DH5_Ant1_2402 2DH5_Ant1_2441 2DH5_Ant1_2480 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 63 of 98 3DH5_Ant1_2402 3DH5_Ant1_2441 3DH5_Ant1_2480 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24022128-1E01 Page 64 of 98 13. Antenna Requirements 13.1. Limit For intentional device, according to FCC 47 CFR Section 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. And according to FCC 47 CFR Section 15.247 (b), if transmitting antennas of directional gain greater than 6 dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna exceeds 6 dBi. 13.2. Result The antenna used for this product as Antenna information described in section 2.1 of the report, and there is no other antenna than that furnished by the responsible party shall be used …

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