2BB5K-6SBluetooth Headset

FCCSTATEMENT: ThisdevicecomplieswithPart15oftheFCCRules.Operationissubject tothefollowingtwoconditions: (1)Thisdevicemaynotcauseharmfulinterference,and (2)Thisdevicemustacceptanyinterferencereceived,including interferencethatmaycauseundesiredoperation. Warning:Changesormodificationsnotexpresslyapprovedbytheparty responsibleforcompliancecouldvoidtheuser'sauthoritytooperatethe equipment. NOTE:Thisequipmenthasbeentestedandfoundtocomplywiththe limitsforaClassBdigitaldevice,pursuanttoPart15oftheFCCRules. Theselimitsaredesignedtoprovidereasonableprotectionagainst harmfulinterferenceinaresidentialinstallation.Thisequipment generatesusesandcanradiateradiofrequencyenergyand,ifnot installedandusedinaccordancewiththeinstructions,maycauseharmful interferencetoradiocommunications.However,thereisnoguarantee thatinterferencewillnotoccurinaparticularinstallation.Ifthisequipment doescauseharmfulinterferencetoradioortelevisionreception,which canbedeterminedbyturningtheequipmentoffandon,theuseris encouragedtotrytocorrecttheinterferencebyoneormoreofthe followingmeasures: Reorientorrelocatethereceivingantenna. Increasetheseparationbetweentheequipmentandreceiver. Connecttheequipmentintoanoutletonacircuitdifferentfromthatto whichthereceiverisconnected. Consultthedealeroranexperiencedradio/TVtechnicianforhelp. RFwarningstatement: ThedevicehasbeenevaluatedtomeetgeneralRFexposure requirement.Thedevicecanbeusedinportableexposurecondition withoutrestriction.

- Shenzhen Shangruisi Industrial Co., LTD - The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 8/24/2023 U.S. Agent Designation [Shenzhen Shangruisi Industrial 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: [2BB5K-6S]): Name and company of U.S. agent: Stone Trading Limited Physical U.S. address of agent: 6547 N Academy Blvd #2266,Colorado Springs,CO 80918,United States FRN of U.S. agent: 0033401936 Email address of U.S. agent: [email protected] [Stone Trading Limited] acknowledges their obligation to accept service of process on behalf of [Shenzhen Shangruisi Industrial Co., LTD]. [Shenzhen Shangruisi Industrial Co., LTD] with the FRN [0025872284] 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 permanentl y 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 th e above and that we are aware of the application requirements listed under § 2.911(d)(7). Sincerely, Signature [Name] Joy Liu [Title] Manger [Company] Shenzhen Shangruisi Industrial Co., LTD Signature [Name of U.S. agent] Dongmei Fang [Title of U.S. agent] Manager [Company of U.S. agent] Stone Trading Limited 48_[mo del] US_Agent_2.911(d)(7) - U, V04

FCC ID: 2BB5K-6S Page 1 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. External Photos Photo 1 Photo 2 FCC ID: 2BB5K-6S Page 2 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 3 Photo 4 FCC ID: 2BB5K-6S Page 3 of 3 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 5 Photo 6 ------End------

Label Location On EUT Label Product Name: Bluetooth Headset Model Number: 6S Trademark: N/A FCC ID: 2BB5K-6S

FCC ID: 2BB5K-6S Page 1 of 2 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Internal Photos Photo 1 Photo 2 PCB Antenna FCC ID: 2BB5K-6S Page 2 of 2 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Photo 3 Photo 4 ------End------

RF EXPOSURE EVALUATION FCC ID: 2BB5K-6S According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b): Routine SAR eva luation refers to that specifically required by §2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to qualify for TCB approval. Channel (MHz) Maximum output power (dBm) Tune up tolerance (dBm) Max Tune Up Power (dBm) Distance (mm) Calculation results Limit Operating Mode 2402 0.41 0.41±1 1.41 5 0.429 3 BDR&EDR 2441 0.32 0.32±1 1.32 5 0.423 3 2480 0.56 0.56±1 1.56 5 0.451 3 2402 1.17 1.17±1 2.17 5 0.511 3 2441 1.06 1.06±1 2.06 5 0.502 3 2480 1.30 1.30±1 2.30 5 0.535 3 Test Results: PASS.

Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 1 of 34 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: Bluetooth Headset Trade Mark: N/A Test Model: 6S Environmental Conditions Temperature: 25.2°C Relative Humidity: 51.2% ATM Pressure: 101Kpa Te s t Engineer: Simba Huang Supervised by: Seal Chen Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 2 of 34 Contents Page COVER PAGE 1 Maximum Conducted Peak Output Power .......................................................................................................................................... 3 1.1 Test Result ............................................................................................................................................................................... 3 1.2 Test Graphs ............................................................................................................................................................................. 4 2 20dB Bandwidth .................................................................................................................................................................................. 7 2.1 Test Result ............................................................................................................................................................................... 7 2.2 Test Graphs ............................................................................................................................................................................. 8 3 Carrier Frequency Separation ........................................................................................................................................................... 11 3.1 Test Result ............................................................................................................................................................................. 11 3.2 Test Graphs ........................................................................................................................................................................... 12 4 Hopping Channel Number ................................................................................................................................................................. 13 4.1 Test Result ............................................................................................................................................................................. 13 4.2 Test Graphs ........................................................................................................................................................................... 14 5 Dwell Time ......................................................................................................................................................................................... 15 5.1 Test Result ............................................................................................................................................................................. 15 5.2 Test Graphs ........................................................................................................................................................................... 16 6 Conducted Spurious Emissions and Band Edges Test ..................................................................................................................... 22 6.1 Test Result ............................................................................................................................................................................. 22 6.2 Test Graphs ........................................................................................................................................................................... 23 7 Band-edge for RF Conducted Emissions .......................................................................................................................................... 33 7.1 Test Result ............................................................................................................................................................................. 33 Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 3 of 34 1 Maximum Conducted Peak Output Power 1.1 Test Result Mode Channel. Maximum Peak Output Power [dBm] Limit [dBm] Verdict GFSK LCH 0.41 21 Pass MCH 0.32 21 Pass HCH 0.56 21 Pass π/4-DQPSK LCH 1.17 21 Pass MCH 1.06 21 Pass HCH 1.30 21 Pass Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 4 of 34 1.2 Test Graphs GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 5 of 34 GFSK_DH5_HCH_2480MHz_Ant1_NTNV π/4-DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 6 of 34 π/4-DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV π/4-DQPSK_2DH5_HCH_2480MHz_Ant1_NTNV Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 7 of 34 2 20dB Bandwidth 2.1 Test Result Mode Channel. 20dB Bandwidth [MHz] Limit [MHz] Verdict GFSK LCH 0.950 Not Specified Pass MCH 0.952 Not Specified Pass HCH 0.951 Not Specified Pass π/4-DQPSK LCH 1.329 Not Specified Pass MCH 1.333 Not Specified Pass HCH 1.301 Not Specified Pass Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 8 of 34 2.2 Test Graphs GFSK_DH5_LCH_2402MHz_Ant1_NTNV GFSK_DH5_MCH_2441MHz_Ant1_NTNV Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 9 of 34 GFSK_DH5_HCH_2480MHz_Ant1_NTNV π/4-DQPSK_2DH5_LCH_2402MHz_Ant1_NTNV Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23071903FW1 FCC ID: 2BB5K-6S Page 10 of 34 π/4-DQPSK_2DH5_MCH_2441MHz_Ant1_NTNV π/4-DQPSK_2DH5_HCH_248…

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Page 1 of 39 Report No.: AIT23071903FW1 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. TEST REPORT Client Information: Applicant: Shenzhen Shangruisi Industrial Co., LTD Applicant add.: No. 152, East SAN Fang, Gangsha Village, Gangsha Community, Futian District, Shenzhen, Guangdong, China Manufacturer: Shenzhen Shangruisi Industrial Co., LTD Manufacturer add.: No. 152, East SAN Fang, Gangsha Village, Gangsha Community, Futian District, Shenzhen, Guangdong, China Product Information: Product Name: Bluetooth Headset Model No.: 6S Brand Name: N/A FCC ID: 2BB5K-6S Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Prepared By: Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang,Dongguan, Guangdong, China Tel.: +86-769-8202 0499 Fax.: +86-769-8202 0495 Date of Receipt: Jul. 19, 2023 Date of Test: Jul. 19, 2023 – Aug. 04, 2023 Date of Issue: Aug. 22, 2023 Test Result: Pass This device described above has been tested by Dongguan Yaxu (AiT) Technology Limited and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. Note: This report shall not be reproduced except in full, without the written approval of Dongguan Yaxu (AiT) Technology Limited, this document may be altered or revised by Dongguan Yaxu (AiT) Technology Limited, personal only, and shall be noted in the revision of the document. This test report must not be used by the client to claim product endorsement. Reviewed by: Approved by: Simba Huang Seal.chen Page 2 of 39 Report No.: AIT23071903FW1 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. 1 Contents Page COVER PAGE 1 CONTENTS ..................................................................................................................................................... 2 2 TEST SUMMARY ............................................................................................................................................ 4 2.1 Statement of the Measurement Uncertainty .............................................................................. 4 2.2 Measurement Uncertainty ......................................................................................................... 4 3 TEST FACILITY ............................................................................................................................................... 5 3.1 Deviation from standard ............................................................................................................ 5 3.2 Abnormalities from standard conditions .................................................................................... 5 3.3 Test Location ............................................................................................................................. 5 4 GENERAL INFORMATION ............................................................................................................................. 6 4.1 Te s t frequencies ........................................................................................................................ 7 4.2 EUT Peripheral List ................................................................................................................... 8 4.3 Test Peripheral List ................................................................................................................... 8 4.4 TEST METHODOLOGY............................................................................................................ 9 4.5 Description of Test Modes ....................................................................................................... 10 5 EQUIPMENT USED DURING TEST ............................................................................................................. 11 6 TEST RESULTS AND MEASUREMENT DATA ........................................................................................... 12 6.1 Antenna requirement .............................................................................................................. 12 6.2 Peak Power Measurement ...................................................................................................... 13 6.3 Frequency Separation and 20 dB Bandwidth .......................................................................... 15 6.4 Number of Hopping Frequency ............................................................................................... 17 6.5 Time of Occupancy (Dwell Time) ............................................................................................ 18 6.6 Conducted Spurious Emissions and Band Edges Test ........................................................... 20 6.7 Restrict-band Band-edge Measurements ............................................................................... 22 6.8 Radiated Emissions Measurement ......................................................................................... 24 6.9 Conducted Emissions ............................................................................................................. 35 6.10 Pseudorandom frequency hopping sequence ......................................................................... 38 7 TEST SETUP PHOTOGRAPHS OF EUT ..................................................................................................... 39 8 EXTERNAL PHOTOGRAPHS OF EUT ........................................................................................................ 39 9 INTERNAL PHOTOGRAPHS OF EUT ......................................................................................................... 39 Page 3 of 39 Report No.: AIT23071903FW1 Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdon…

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version01 Shenzhen Shangruisi Industrial Co., LTD Declaration concerning Antenna Specification It i s hereby declared that the product M odel No.: 6S FCC ID: 2BB5K-6S f ulf ill s the requirement in FCC test relating to the antenna ty pe. T he device specified above confirms to the FCC recommendations for PCB antenna type(s) described below: Model No. of antenna: 2.4G ANT Type of antenna: PCB Antenna Gain of the antenna: -0.58 dBi F requency range: 2400-2500 MHz The mounting of the antenna is fixed to the radio module and no other antenna should be used. Company name: Shenzhen Shangruisi Industrial Co., LTD Address: No. 152, East SAN Fang, Gangsha Village, Gangsha Community, Futian District, , City: Shenzhen, Guangdong ZIP / Postal code: Country: China P lace: Place: Date: 2023-08-23 Signature:

Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4G ANT Horizontal Vertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.26 -0.76 -0.58 -5.25 -2.46 -1.86 MAX. Gain -0.58dB Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Page 1 of 2 FCC ID: 2BB5K-6S Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Test Setup Photo Radiated Emission Page 2 of 2 FCC ID: 2BB5K-6S Dongguan Yaxu (AiT) Technology Limited No.22, Jinqianling 3rd Street, Jitigang, Huangjiang, Dongguan, Guangdong, China. Conducted Emission ------End------