2AKMBHA-NP40TWIRELESS HEADPHONES

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Kingstate Electronics(DongGuan)Co.,Ltd. Covered Equipment Certification Attestation Letter 2024-06-28 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID:2AKMBHA-NP40T Kingstate Electronics(DongGuan)Co.,Ltd. (“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. Kingstate Electronics(DongGuan)Co.,Ltd. (“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: Jason Guo Title: Engineer Company Name: Kingstate Electronics(DongGuan)Co.,Ltd. Address: No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China Phone: 86-769-89212688 E-Mail: [email protected] Date: 2024-06-28

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: FCC US Agent, LLC FRN: 0033402884 Contact Name: Tim Payne Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Telephone No: 708-571-3148 Email: [email protected] Applicant: Company name: Kingstate Electronics(DongGuan)Co.,Ltd. Product Description: WIRELESS HEADPHONES Grantee code: 2AKMB FCC ID: 2AKMBHA-NP40T FRN：0026103820 Contact Name: Jason Guo Address: No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Telephone No: 86-769-89212688 Email: [email protected] Kingstate Electronics(DongGuan)Co.,Ltd. certifies that, as of the date of this filing of the application with the TCB, [FCC US Agent, LLC] is our designated US agent for service of process for the above referenced FCC ID. Kingstate Electronics(DongGuan)Co.,Ltd. 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 equipment. [FCC US Agent, LLC] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2024-06-28 Applicant’s Name: Jason Guo US Agent’s Name: Tim Payne Title: Engineer Title: Manager Signature： Signature

Kingstate Electronics(DongGuan)Co.,Ltd. 2024-06-28 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, Guangdong 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: Jason Guo Title: Engineer Company Name: Kingstate Electronics(DongGuan)Co.,Ltd. Address: No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China.. Phone: 86-769-89212688 E-Mail: [email protected] Date: 2024-06-28

Kingstate Electronics(DongGuan)Co.,Ltd. 2024-06-28 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 REQUEST FOR CONFIDENTIALITY – FCC FCC ID: 2AKMBHA-NP40T 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 insert number 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: Jason Guo Title: Engineer Company Name: Kingstate Electronics(DongGuan)Co.,Ltd. Address: No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Phone: 86-769-89212688 E-Mail: [email protected] Date: 2024-06-28

Kingstate Electronics(DongGuan)Co.,Ltd Product Similarity Declaration Product name: WIRELESS HEADPHONES Model name: HA-NP40T We (Kingstate Electronics(Dongguan)Co.,Ltd) hereby declare that the left side and the right side of the headset using the same RF chip, antenna. PCB and component because of the left and right ear layout needs to be different but does not affect the RF characteristics. Complete testing of both left and right ears can be done under the same ID. Signature: Name: Jason Guo Title: Engineer Date: 2024-6-28

ShenzhenYushengCommunicationEquipmentCo.,LTD 113 KS588projectantennaspecification Customername:DongguanZhifengElectronicsCo.,LTD Customerproductname:KS588 Productname:Antenna Productspecification:LFPCantenna/RFPCantenna Materialcode: BT-L-FPC;BT-R-FPC ChangeContentCV: order number editionstateStartandend date person liable page number remarks 1R:aR:a2024-06-04LiJieyi13 TheSupplieracknowledgesthesignatureofthefollowingpart: Responsibleperson/dateIQC/Date-Review/DateApproval/Date MD FengJiwu SuGuanfeng Havedetailed good RF ChenKehong TheDemanderacknowledgesthesignature(pleasesenditbackaftertheconfirmation): Thedemandertheresult:□qualified□unqualified Development&Design Engineer/Date SQEEngineer/DatePurchasingLeader/ Date DevelopmentManager approval/date ShenzhenYushengCommunicationEquipmentCo.,LTD 213 catalogue 1.OVERVIEW......................................................................................................................................................3 1.1S COPEOFAPPLICATION......................................................................................................................................3 1.2PROJECTBASICINFORMATION...........................................................................................................................3 2.TECHNICALINDEXREQUIREMENTS.....................................................................................................3 2.1I NTRODUCTIONOFTESTITEMSANDEQUIPMENT.............................................................................................3 2.2ACTIVEREPORTING.............................................................................................................................................3 2.2.1T ESTINSTRUCTIONS........................................................................................................................................3 2.2.2CREATIVEGUIDEDATA.....................................................................................................................................4 2.2.3THEMATCHINGCIRCUITISSHOWNBELOW....................................................................................................4 2.2.4T HEANTENNAOTA..........................................................................................................................................5 2.2.5EFFICIENCYOFTHEANTENNA.........................................................................................................................6 2.2.6D IRECTIONDIAGRAM......................................................................................................................................7 2.2.7THEPASSIVEPARAMETERS...............................................................................................................................8 2.2.8PULLDISTANCETEST........................................................................................................................................8 3.STRUCTURALDRAWINGS.........................................................................................................................9 LEDGE........................................................................................................................................................................9 R EDGE.....................................................................................................................................................................10 4.LISTOFMATERIALS...................................................................................................................................11 5.PACKAGESCHEMATICDIAGRAM........................................................................................................12 6.MANUFACTURERS.....................................................................................................................................13 ShenzhenYushengCommunicationEquipmentCo.,LTD 313 1.Overview 1.1Scopeofapplication Thisrequirement,providedKS588Antennatechnicalrequirementsandmaterialrequirements specifications. ThisrequirementappliestoKS588Antennatypeselection,test,andacceptance. 1.2Projectbasicinformation Antennaname: KS588 Antennafrequency: BT：2402-2484MHz Antennamaterial:FPC 2.Technicalindexrequirements 2.1Introductionoftestitemsandequipment inventorytestitem equipment ActivetestTRP,TISIntegratedtester,microwavedarkroom 2.2ActiveReporting 2.2.1Testinstructions Testtools:Agilent8960instrument,R&SCMW500,fullwavefarfieldETSdarkroom,highprecisio npositioningsystemanditscontrollerandcomputerwithautomatictestprogram Testenvironment:temperature22 °C± 3 °C ,humidity50% ± 15% Testmethod:DUTisfixedinthecenteroftheturntablewithHplane,onthesamehorizontallineas thecenterofthehornantenna. ThepositioningsystemenablestheDUTtorotateinthewholespheretosatisfythehigh-precision3D positioning.EachRFinstrumentandturntablecontrollercommunicatewiththePCwithautomatictestsoftware throughtheGPIBinterface. ShenzhenYushengCommunicationEquipmentCo.,LTD 413 2.2.2CreativeGuidedata Channelpowersensitivity L 09.1-93.0 399.2-93.0 789.1-93.0 Channelpowersensitivity R 08.9-93.0 399.0-93.0 789.0-93.0 2.2.3Thematchingcircuitisshownbelow ShenzhenYushengCommunicationEquipmentCo.,LTD 513 2.2.4Theantennaota L ChannelTRP（dBm）TIS（dBm） free space 01.25-85.85 391.68-86.02 781.85-86.32 ChannelTRP（dBm）TIS（dBm） Head model data L 0-2.35-82.01 39-2.14-82.35 78-1.69-82.45 R ChannelTRP（dBm）TIS（dBm） free space 01.35-86.21 392.02-86.68 782.24-87.14 R ChannelTRP（dBm）TIS（dBm） free space 0-2.05-82.4 39-1.68-82.5 78-1.49-82.65 ShenzhenYushengCommunicationEquipmentCo.,LTD 613 2.2.5Efficiencyoftheantenna FreqEffiGain (MHz)(%)(dBi) 241017-1 242018-0.6 243020-0.5 2440230.1 2450260.2 246028-0.3 247026-0.4 248022-0.5 249019-0.3 250016-0.4 FreqEffiGain (MHz)(%)(dBi) 241017-1 242016-0.9 243018-0.8 244022-0.7 245024-0.6 246027-0.6 247026-0.5 248022-0.4 249019-0.5 250017-0.4 L R ShenzhenYushengCommunicationEquipmentCo.,LTD 713 2.2.6Directiondiagram ShenzhenYushengCommunicationEquipme…

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Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24050810-1E04 TRF No.: RT-4-E-02-601 FCC SAR Test Report Ver.1.1 Page 1 of 28 FCC AND ISED SAR TEST REPORT Applicant : Kingstate Electronics(Dongguan)Co.,Ltd Address of Applicant : No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Manufacturer : Kingstate Electronics(Dongguan)Co.,Ltd Address of Manufacturer : No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Equipment under Test : WIRELESS HEADPHONES Model No. : HA-NP40T Trade Mark : JVC FCC ID : 2AKMBHA-NP40T IC : 12522A-NP40T Test Standard(s) : Test Standard Used: IEEE Std. 1528-2013; IEC/IEEE 62209-1528:2020 FCC Rules and Regulations: 47 CFR § 2.1093 ISED Rules and Regulations: RSS-102 Issue5, Mar. 2015 Test Procedure Used: KDB447498 D04 v01, KDB 865664 D01 v01r04, KDB 865664 D02 v01r02 Report No. : DDT-RE24050810-1E04 Issue Date : 2024/06/27 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Address of Laboratory : 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-RE24050810-1E04 TRF No.: RT-4-E-02-601 FCC SAR Test Report Ver.1.1 Page 2 of 28 Table of Contents 1. General test information ...................................................................................................... 6 1.1. Description of EUT .............................................................................................................. 6 1.2. Accessories of EUT ............................................................................................................. 6 1.3. Assistant equipment used for test ....................................................................................... 6 1.4. Block diagram of EUT configuration for test ....................................................................... 6 1.5. Test environment conditions ............................................................................................... 7 1.6. Test laboratory .................................................................................................................... 7 2. Summary of test results ...................................................................................................... 8 2.1. Report SAR results ............................................................................................................. 8 2.2. RF exposure limits .............................................................................................................. 8 3. SAR measurements system configuration .......................................................................... 9 3.1. The SAR measurement system .......................................................................................... 9 3.2. Isotropic E-field probe EX3DV4 ........................................................................................ 10 3.3. SAM twin phantom ............................................................................................................ 10 3.4. ELI phantom ...................................................................................................................... 11 3.5. Data acquisition electronics (DAE) ................................................................................... 11 3.6. Device holder for transmitters ........................................................................................... 12 4. Measurement procedure ................................................................................................... 13 4.1. Scanning procedure .......................................................................................................... 13 5. Description of test position ................................................................................................ 15 5.1. Body-worn accessory configurations ................................................................................ 15 5.2. Extremity exposure configurations .................................................................................... 16 6. RF exposure conditions .................................................................................................... 17 6.1. EUT Test sides .................................................................................................................. 17 6.2. Standalone SAR test exclusion considerations ................................................................ 17 7. SAR system verification procedure ................................................................................... 19 7.1. Tissue simulate liquid ........................................................................................................ 19 7.1.1. Target dielectric properties of head tissue-equivalent material ........................................ 19 7.1.2. Measurement for tissue simulate liquid ............................................................................ 19 7.2. SAR system validation ...................................................................................................... 21 7.2.1. Justification for extended SAR dipole calibrations ............................................................ 22 7.2.2. Validation test setup photograph ...................................................................................... 22 7.2.3. Summary system validation results .................................................................................. 23 7.2.4. Detailed system validation results ..................................................................................... 23 8. Equipment list .................................................................................................................... 24 9. Measurement uncertainty .................................................................................................. 25 Guangdong Dongdian Testing Service Co., Ltd. Re…

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Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 1 of 3 Appendix A System Validation Plots Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 2 of 3 Table of Contents 1. D2450V2-SN: 904 Validation Plot ..................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 3 of 3 1. D2450V2-SN: 904 Validation Plot

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 1 of 4 Appendix B Highest Test Plots Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 2 of 4 Table of Contents 1. BT Head-worn 0mm SAR ....................................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 3 of 4 1. BT Head-worn 0mm SAR Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 4 of 4

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 1 of 30 Appendix C Calibration Certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 2 of 30 Table of Contents 1. D2450V2-SN: 904 Calibration certification ............................................................................. 3 2. D5GHzV2-SN: 1148 Calibration certification .......................................................................... 9 3. DAE4-SN: 1366 Calibration certification............................................................................... 19 4. EX3DV4-SN: 3906 Calibration certification .......................................................................... 22 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 3 of 30 1. D2450V2-SN: 904 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 4 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 5 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 6 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 7 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 8 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 9 of 30 2. D5GHzV2-SN: 1148 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 10 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 11 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 12 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 13 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 14 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 15 of 30

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 16 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 17 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 18 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 19 of 30 3. DAE4-SN: 1366 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 20 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 21 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 22 of 30 4. EX3DV4-SN: 3906 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 23 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 24 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 25 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 26 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 27 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 28 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 29 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 30 of 30

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 1 of 8 Appendix D Test setup photograph Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 2 of 8 Table of Contents 1. 2.4G Tissue Head-worn Photograph ...................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 3 of 8 1. 2.4G Tissue Head-worn Photograph L Top Side-0mm L Bottom Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 4 of 8 Left Side-0mm L Right Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 5 of 8 L Front side-0mm L Back Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 6 of 8 R Top Side-0mm R Bottom Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 7 of 8 R Left Side-0mm R Right Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24050810-1E04 Page 8 of 8 R Front Side-0mm R Back Side-0mm

Guangdong Dongdian Testing ServiceCo.,Ltd. Page 1 of 5 Appendix E Dipole Antenna self-calibration Guangdong Dongdian Testing ServiceCo.,Ltd. Page 2 of 5 Table of Contents 1. Calibration Date ...................................................................................................................... 3 2. Calibration Items ..................................................................................................................... 3 3. Standards ................................................................................................................................ 5 4. Laboratory ............................................................................................................................... 5 5. Calibration Results .................................................................................................................. 5 Guangdong Dongdian Testing ServiceCo.,Ltd. Page 3 of 5 1. Calibration Date Calibration Date Oct.20,2023, Due to Oct.19,2024 2. Calibration Items Dipole Antenna self-calibration 1、 Calibration Method Immediate re-calibration is required for the following conditions. 1) According to KDB 865664 D01, When the most recent return-loss result, measured at least annually, deviates by more than 20% from the previous measurement (i.e. value in dB  0.2) or not meeting the required 20 dB minimum return-loss requirement. 2) When the most recent measurement of the real or imaginary parts of the impedance, measured at least annually, deviates by more than 5 Ω from the previous measurement. 3）When the measured SAR deviates from the calibrated SAR value by more than 10% due to changes in physical, mechanical, electrical or other relevant dipole conditions; i.e., the error is not introduced by incorrect measurement procedures or other issues relating to the SAR measurement system. 2、 Calibration Purpose Demonstrate that SAR target, the impedance and return loss of the dipole remain stable as required 3、 Test The Product Manufacturer Speag Name 2450MHz Dipole antenna Model number D2450V2 Environment temperature 20.8°C Look pictures As shown in figure 1 Manufacturer Speag Name 5GHz Dipole antenna Model numbe D5GHZV2 Environment temperature 20.8°C Look pictures As shown in figure 2 Guangdong Dongdian Testing ServiceCo.,Ltd. Page 4 of 5 Figure 1 Test signal source Figure 2 Test signal source Guangdong Dongdian Testing ServiceCo.,Ltd. Page 5 of 5 3. Standards This antenna calibration is conducted according to KDB 865664 D01 4. Laboratory The following personnel participated in this laboratory: Table 1： Participate in the measurement laboratory Laboratory Name Temp°C Test person Guangdong Dongdian Testing Service Co., Ltd. 20.8°C Johnson Huang 5. Calibration Results The quality control test results are shown in Table 2 and Table 3, and the detailed test data is in the attachment Table 2 Calibrated Antenna Target Return loss Test Return loss Deviation Result 2450 -28.825 -28.394 1.50% OK 5200 -24.780 -20.041 19.12% OK 5300 -24.151 -27.179 12.54% OK 5500 -23.082 -25.183 9.10% OK 5600 -22.239 -23.471 5.54% OK Table 3 Calibrated Antenna Target Impedance （Real） Target Impedance （Imaginary Test Impedance （Real） Test Impedance （Imaginary） Deviation （Real） Deviation （Imaginary） Result 2450 53.391 1.586 50.607 2.878 2.784 1.292 OK 5200 49.477 -8.009 52.310 -8.448 2.833 0.439 OK 5300 54.645 -5.723 49.946 -3.293 4.699 2.43 OK 5500 56.887 -4.538 52.061 -5.591 4.826 1.053 OK 5600 56.214 -5.378 52.520 -4.505 3.694 0.873 OK

Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE24050810-1E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 1 of 154 FCC AND ISED CERTIFICATION TEST REPORT Applicant : Kingstate Electronics(Dongguan)Co.,Ltd Address of Applicant : No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Manufacturer : Kingstate Electronics(Dongguan)Co.,Ltd Address of Manufacturer : No 11 Chong Tian Avenue, Shi Pai Town, Dong Guan City, Guang Dong Province, China. Equipment under Test : WIRELESS HEADPHONES Model No. : HA-NP40T…

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