2AVW7-BS935MMICROPHONE

FCC Statement This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2)this device must accept any interference received, including interference that may cause undesired operation. 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. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. RF Exposure Information The device was evaluated to meet general RF exposure requirements. This equipment should be installed and used with a minimum distance of 0 mm between the radiator and your body.

ANC CHINA LIMITED ROOM 803, CHEVALIER HOUSE 45-51 CHATHAM ROAD SOUTH,TSIM SHA TSUI HONGKONG China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2023-9-1 To whom it may concern: We, ANC CHINA LIMITED , hereby certify that the equipment for which authorization is sought (FCC ID: 2AVW7-BS935M) 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, Signature Alice Chen General manager ANC CHINA LIMITED 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V03

-ANCCHINALIMITED- FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 8/23/23 U.S.AgentDesignation ANCCHINALIMITEDacknowledgestheirconsentforthefollowingcontactlocatedintheUnitedStatestoact astheiragentforserviceofprocessfortheequipmentforwhichauthorizationissought(FCCID:2AVW7- BS935M): NameandcompanyofU.S.agent: TimPayne,FCCUSAgent,LLC PhysicalU.S.addressofagent:3722IllinoisAvenue,SaintCharles,IL,60174,USA FRNofU.S.agent: 0033402884 EmailaddressofU.S.agent: [email protected] FCCUSAgent,LLCacknowledgestheirobligationtoacceptserviceofprocessonbehalfofANCCHINA LIMITED. ANCCHINALIMITEDwiththeFRN0029331295acceptsitsobligationtomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanentlyterminatedall marketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofanyCommission- relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirementslistedunder§ 2.911(d)(7). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB 986446D01. Anexpirationdateforthisletterdoesnotexist.IncasetheU.S.agentchanges,thegranteeisobligatedtonotify theFCCwithin30daysviathegrantingTCB. Sincerely, Signature AliceChen Manager ANCCHINALIMITED Signature TimPayne Manager FCCUSAgent,LLC 48_[model] US_Agent_2.911(d)(7)-U, V05

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2023-9-1> 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 2AVW7-BS935M BS935M / VTA-82507M 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, Name/Title： Alice Chen/General manager Company: ANC CHINA LIMITED Address: ROOM 803, CHEVALIER HOUSE 45-51 CHATHAM ROAD SOUTH,TSIM SHA TSUI HONGKONG China Phone: 86-0852-26681868 Fax: 86-0852-26681868 E-Mail: [email protected]

ANC CHINA LIMITED ROOM 803, CHEVALIER HOUSE 45-51 CHATHAM ROAD SOUTH,TSIM SHA TSUI HONGKONG China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2023-9-1 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: 2AVW7-BS935M 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, Name/Title： Alice Chen/General manager Company: ANC CHINA LIMITED Address: ROOM 803, CHEVALIER HOUSE 45-51 CHATHAM ROAD SOUTH,TSIM SHA TSUI HONGKONG China Phone: 86-0852-26681868 Fax: 86-0852-26681868 E-Mail: [email protected]

Page1of4FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. ExternalPhotos Photo1 Photo2 Page2of4FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo3 Photo4 Page3of4FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo5 Photo6 Page4of4FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo7 ------End------

Label FCCID:2AVW7-BS935M

Page1of4FCCID: 2AVW7-BS935M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. InternalPhotos Photo1 Photo2 Page2of4FCCID: 2AVW7-BS935M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo3 Photo4 Page3of4FCCID: 2AVW7-BS935M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo5 Photo6 Antenna Page4of4FCCID: 2AVW7-BS935M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. Photo7 Photo8 ------End------

RFExposureevaluation FCCID:2AVW7-BS935M ApplicableStandard Accordingto§1.1307(b)(1),systemsoperatingundertheprovisionsofthissectionshallbeoperatedina mannerthatensuresthatthepublicisnotexposedtoradiofrequencyenergylevelinexcessofthe Commission’sguidelines. Accordingto§1.1310and§2.1093RFexposurerequirement KDB447498v06:MobileandPortableDevicesRFExposureProceduresandEquipmentAuthorization Policies 1.1.Requirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06Section4.3.1StandaloneSARtest exclusionconsiderations:“UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures, standalone1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposureconditions, bymeasurementornumericalsimulation,isnotrequiredwhenthecorrespondingSARTestExclusion Thresholdcondition,listedbelow,issatisfied.Thesetestexclusionconditionsarebasedonsource-based time-averagedmaximumconductedoutputpoweroftheRFchannelrequiringevaluation,adjustedfortune-up tolerance,andtheminimumtestseparationdistancerequiredfortheexposureconditions.22Theminimum testseparationdistanceisdeterminedbythesmallestdistancefromtheantennaandradiatingstructuresor outersurfaceofthedevice,accordingtothehostformfactor,exposureconditionsandplatformrequirements, toanypartofthebodyorextremityofauserorbystander(see5)ofsection4.1).ToqualifyforSARtest exclusion,thetestseparationdistancesappliedmustbefullyexplainedandjustifiedbytheoperating configurationsandexposureconditionsofthetransmitterandapplicablehostplatformrequirements,typically intheSARmeasurementorSARanalysisreport,accordingtotherequiredpublishedRFexposureKDB procedures.WhennootherRFexposuretestingorreportingisrequired,astatementofjustificationand compliancemustbeincludedintheequipmentapproval,inlieuoftheSARreport,toqualifyfortheSARtest exclusion.Whenrequired,thedevicespecificconditionsdescribedintheotherpublishedRFexposureKDB proceduresmustbesatisfiedbeforeapplyingtheseSARtestexclusionprovisions;forexample,handheldPTT two-wayradios,handsets,laptops&tabletsetc.23“ [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance,mm)]·[√f(GHz)] ≤ 3.0for1-gSARand ≤ 7.5for10-gextremitySAR,where: • f(GHz)istheRFchanneltransmitfrequencyinGHz •PoweranddistanceareroundedtothenearestmWandmmbeforecalculation •Theresultisroundedtoonedecimalplaceforcomparison • 3.0and7.5arereferredtoasthenumericthresholdsinthestep2below Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mmandfor transmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtestseparationdistanceis<5 mm,adistanceof5mmaccordingto5)insection4.1isappliedtodetermineSARtestexclusion. 1.2.Manufacturingtolerance BR-EDR Frequency (MHz) GFSK 240224402480 Target(dBm)-1.41-0.49-0.61 Tolerance±(dB)1.01.01.0 Frequency (MHz) π/4DQPSK 240224402480 Target(dBm)-2.63-1.67-1.57 Tolerance±(dB)1.01.01.0 Page2of2 2.EvaluationResult EvaluationResults Band/Modef(GHz) Antenna Distance (mm) Max.RFoutputpower (includingtune-up tolerance) SARTest Exclusion Threshold SARTest Exclusion dBmmW BR-EDR2.550.511.120.36<3Yes 3.Conclusion ThemeasurementresultscomplywiththeFCCLimitper47CFR2.1093fortheuncontrolledRFExposure andSARExclusionThresholdperKDB447498v06 .....................EndofReport.........................

Page1of38ReportNo.:AIT23080701FW1 DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. TESTREPORT ClientInformation: Applicant:ANCCHINALIMITED Applicantadd.: ROOM803,CHEVALIERHOUSE45-51CHATHAMROADSOUTH,TSIM SHATSUIHONGKONGChina Manufacturer:SHENZHENHTZTECHNOLOGYCO.,LTD Manufactureradd.: ROOM803,CHEVALIERHOUSE45-51CHATHAMROADSOUTH,TSIM SHATSUIHONGKONGChina ProductInformation: ProductName:MICROPHONE ModelNo.:BS935M/VTA-82507M BrandName:N/A FCCID: 2AVW7-BS935M Applicablestandards: FCCCFRTitle47Part15SubpartCSection15.247 PreparedBy: DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang,Huangjiang,Dongguan, Guangdong,China Tel.:+86-769-82020499Fax.:+86-769-82020495 DateofReceipt:Aug.07,2023DateofTest:Aug.07~Aug.08,2023 DateofIssue:Aug.09,2023TestResult:Pass ThisdevicedescribedabovehasbeentestedbyDongguanYaxu(AiT)TechnologyLimitedandthe testresultsshowthattheequipmentundertest(EUT)isincompliancewiththeFCCrequirements. Anditisapplicableonlytothetestedsampleidentifiedinthereport. Note:Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofDongguan Yaxu(AiT)TechnologyLimited,thisdocumentmaybealteredorrevisedbyDongguanYaxu(AiT) TechnologyLimited,personalonly,andshallbenotedintherevisionofthedocument.Thistest reportmustnotbeusedbytheclienttoclaimproductendorsement. Reviewedby:Approvedby: SimbaHuangSeal.chen Page2of38ReportNo.:AIT23080701FW1 DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. 1Contents Page COVERPAGE 1CONTENTS......................................................................................................................................................................2 2TESTSUMMARY............................................................................................................................................................4 2.1StatementoftheMeasurementUncertainty................................................................................4 2.2MeasurementUncertainty............................................................................................................4 3TESTFACILITY..............................................................................................................................................................5 3.1Deviationfromstandard...............................................................................................................5 3.2Abnormalitiesfromstandardconditions.......................................................................................5 3.3TestLocation.................................................................................................................................5 4GENERALINFORMATION...........................................................................................................................................6 4.1Testfrequencies............................................................................................................................7 4.2EUTPeripheralList.......................................................................................................................8 4.3TestPeripheralList.......................................................................................................................8 4.4TESTMETHODOLOGY...............................................................................................................9 4.5DescriptionofTestModes..........................................................................................................10 5EQUIPMENTUSEDDURINGTEST.........................................................................................................................11 6TESTRESULTSANDMEASUREMENTDATA.....................................................................................................11 6.1Antennarequirement..................................................................................................................12 6.2PeakPowerMeasurement.........................................................................................................13 6.3FrequencySeparationand20dBBandwidth............................................................................15 6.4NumberofHoppingFrequency..................................................................................................17 6.5TimeofOccupancy(DwellTime)...............................................................................................18 6.6ConductedSpuriousEmissionsandBandEdgesTest.............................................................20 6.7Restrict-bandBand-edgeMeasurements..................................................................................22 6.8RadiatedEmissionsMeasurement............................................................................................24 6.9ConductedEmissions.................................................................................................................34 6.10Pseudorandomfrequencyhoppingsequence...........................................................................37 7TESTSETUPPHOTOGRAPHSOFEUT.................................................................................................................38 8EXTERNALPHOTOGRAPHSOFEUT....................................................................................................................38 9INTERNALPHOTOGRAPHSOFEUT.....................................................................................................................38 Page3of38ReportNo.:AIT23080701FW1 DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. RevisionHistory RevisionIssueDateRevisionsRevisedBy 000 Aug.09,2023 InitialIssueSealChen Page4of38ReportNo.:AIT23080701FW1 DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. 2TestSummary TestItemSectioninCFR47Result Maxi…

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Product specification Quick Reference Date Antenna module on the system board Frequenc Range 2400 ~ 2500MHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -1.2 (Input pwr – loss pwr) Peak EIRP(dBm) 1.2 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 6 0.2 % Gain (dBi) 1.2 (Avg Gain XY-plane) Maximum Power (dBm) 1.7 (XY-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-plane) Input Impendence(ohm) 50 Polarization Type V ertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board 1.2 -0.5 1.9 -3.6 1.1 -3.0 6 0.2 % Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram XY-plane XZ-plane YZ-plane

Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23080701FW1 FCC ID:2AVW7-BS935M Page 1 of 42 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: MICROPHONE Trade Mark: N/A Test Model: BS935M / VTA-82507M Environmental Conditions Temperature: 25.8°C Relative Humidity:52.4% ATM Pressure:101Kpa Test Engineer:Simba Huang Supervised by:Seal Chen Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23080701FW1 FCC ID:2AVW7-BS935M Page 2 of 42 Contents Page COVER PAGE 1 Duty Cycle........................................................................................................................................................................................ 3 1.1Test Result............................................................................................................................................................................3 1.2Test Graphs...........................................................................................................................................................................4 2 Maximum Conducted Peak Output Power........................................................................................................................................ 7 2.1Test Result............................................................................................................................................................................7 2.2Test Graphs...........................................................................................................................................................................8 3 20dB Bandwidth..............................................................................................................................................................................11 3.1Test Result.......................................................................................................................................................................... 11 3.2Test Graphs.........................................................................................................................................................................12 4 Carrier Frequency Separation.........................................................................................................................................................15 4.1Test Result..........................................................................................................................................................................15 4.2Test Graphs.........................................................................................................................................................................16 5 Hopping Channel Number...............................................................................................................................................................17 5.1Test Result..........................................................................................................................................................................17 5.2Test Graphs.........................................................................................................................................................................18 6 Dwell Time...................................................................................................................................................................................... 19 6.1Test Result..........................................................................................................................................................................19 6.2Test Graphs.........................................................................................................................................................................20 7 RF Conducted Spurious Emissions.................................................................................................................................................22 7.1Test Result..........................................................................................................................................................................22 7.2Test Graphs.........................................................................................................................................................................23 8 Band-edge for RF Conducted Emissions........................................................................................................................................29 8.1Test Result..........................................................................................................................................................................29 8.2Test Graphs.........................................................................................................................................................................30 9 Restrict-band band-edge measurements........................................................................................................................................38 9.1Test Result..........................................................................................................................................................................38 9.2Test Graphs.........................................................................................................................................................................39 Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23080701FW1 FCC ID:2AVW7-BS935M Page 3 of 42 1 Duty Cycle 1.1 Test Result ModeFrequency (MHz)Duty Cycle (%)1/T (kHz) 1-DH1240231.212.63 1-DH1244131.22.63 1-DH1248031.312.56 2-DH12402322.56 2-DH1244132.012.56 2-DH12480322.56 Dongguan Yaxu(AiT) Technology Limited Report No.: AIT23080701FW1 FCC ID:2AVW7-BS935M Page 4 of 42 1.2 Test Graphs Test Graphs 1-DH1 2402MHz 1-DH1 2441MHz Dongguan Yaxu(AiT) Technology Limited…

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Page1of2FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. TestSetupPhoto RadiatedEmission Page2of2FCCID: 2AVW7-BS935 M DongguanYaxu(AiT)TechnologyLimited No.22,Jinqianling3rdStreet,Jitigang, Huangjiang,Dongguan,Guangdong,China. ConductedEmission ------End------