2BTND-KC-T06True wireless headphones

Rev 1/26/2023 Shenzhen Xiaoqie Electronics Co., Ltd Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 12-19-2025 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2BTND-KC-T06 Applicant FRN: 0037746468 [Shenzhen Xiaoqie Electronics Co., Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, [FCC US Agent, LLC] is our designated U.S. agent for service of process for the above referenced FCC ID. [Shenzhen Xiaoqie Electronics 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 the equipment. [FCC US Agent, LLC] accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: [FCC US Agent, LLC] U.S. Agent FRN: [0033402884] Address: [3722 Illinois Avenue, Saint Charles, IL, 60174, USA] Contact Person: [Tim Payne] Tel.: [708-571-3148] Email: [[email protected]] Sincerely, [Shenzhen Xiaoqie Electronics Co., Ltd] [FCC US Agent, LLC] [Jin Li] [Tim Payne] [U.S. Agent signature]

Rev1/26/2023 ShenzhenXiaoqieElectronicsCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:12-19-2025 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BTND-KC-T06 [ShenzhenXiaoqieElectronicsCo.,Ltd](“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivinganequipment authorizationpursuanttosection2.903oftheFCCrules. [ShenzhenXiaoqieElectronicsCo.,Ltd](“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofitssuccessorsandassignees,includingequipmentwithintegratedKaspersky Lab,Inc.(oranyofitssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24- 886andKDB986446D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, JinLi Rev1/26/2023 ShenzhenXiaoqieElectronicsCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:12-19-2025 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BTND-KC-T06 [ShenzhenXiaoqieElectronicsCo.,Ltd](“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofits subsidiariesoraffiliates)asanentityproducing“covered”equipment. Sincerely, JinLi

M:\MasterDocuments\TEMPLATES\POA_Letter.doc ShenzhenXiaoqieElectronicsCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Date:12-19-2025 SUBJECT:FCCApplicationforFCCID:2BTND-KC-T06 ToWhomItMayConcern: We,theundersigned,herebyauthorizeSallyZhangatShenzhenEUTestingLaboratory Limitedonourbehalf,toapplytotheFederalCommunicationsCommissiononour equipment.Anyandallactscarriedoutby_ShenzhenEUTestingLaboratoryLimited_on ourbehalfshallhavethesameeffectasactsofourown. ThisistoadvisethatweareinfullcompliancewiththeAnti-DrugAbuseAct.We,the applicant,arenotsubjecttoadenialoffederalbenefitspursuanttoSection5301ofthe Anti-DrugActof1988,21USC853a,andnopartytotheapplicationissubjecttoadenial offederalbenefitspursuanttothatsection. Regards, JinLi ShenzhenXiaoqieElectronicsCo.,Ltd

Rev11/20/07 ShenzhenXiaoqieElectronicsCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision ConfidentialityRequestregardingapplicationforcertificationofFCCID:2BTND-KC-T06. PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestconfidential treatmentofinformationaccompanyingthisapplicationasoutlinedbelow: ExhibitTypeFileName* Schematics BlockDiagram OperationDescription “Schematics.pdf” “BlockDiagram.pdf” “CircuitDescription.pdf” Theabovematerialscontaintradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthesematerialsmaybeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors. TheapplicantunderstandsthatpursuanttoSection0.457oftheRules,disclosureofthis applicationandallaccompanyingdocumentationwillnotbemadebeforethedateoftheGrant forthisapplication. PursuanttoDA04-1705June15,2004oftheCommission’spublicnotice,wealsorequest temporaryconfidentialtreatmentofinformationaccompanyingthisapplicationasoutlinedbelow: ExhibitTypeFileName* TestSetupPhotos ExternalPhotos InternalPhotos UserManual “AppendixA-TestSetupPhotofor8336EU122621W.pdf” “AppendixB-EUTExternalPhotofor8336EU122621W.pdf” “AppendixC-EUTInternalPhotofor8336EU122621W.pdf” “UserManual.pdf” Sincerely, printedname:JinLi

Label Location Label Size: 2.5*1cm True wireless headphones Model: KC-T06 FCC ID: 2BTND-KC-T06

RFEXPOSUREEVALUATION FCCID:2BTND-KC-T06 AccordingtoKDB447498D01GeneralRFExposureGuidancev06andFCC 1.1310:Thecriterialistedinthefollowingtableshallbeusedtoevaluatethe environmentimpactofhumanexposuretoradiofrequency(RF)Radiationas specifiedin§1.1307(b): RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,using measurementsorcomputersimulation.WhenroutineSARevaluationisnot required,portabletransmitterswithoutputpowergreaterthantheapplicable lowthresholdrequireSARevaluationtoqualifyforTCBapproval. Channel (MHz) Maximum outputpower (dBm) Tuneup tolerance (dBm) MaxTune UpPower (dBm) Distanc e (mm) Calculation results Limit Operating Mode 2402-2.02 -2.02±1 -1.0250.2453 BDR&EDR 2441-2.78-2.78±1-1.7850.2073 2480-1.90-1.90±1-0.950.2563 24020.42 0.42±1 1.4250.4303 2441-0.25-0.25±10.7550.3713 24800.360.36±11.3650.4313 TestResults:PASS.

TESTREPORT ReportNo.:8336EU122621W Applicant:ShenzhenXiaoqieElectronicsCo., Ltd Address:Room301, BuildingB12, YintianIndustrialZone, YantianCommunity,XixiangStreet,Bao'anDistrict, ShenzhenCity, China ProductName:True wirelessheadphones ModelNo.:KC-T06 Trademark:N/A FCC ID:2BTND-KC-T06 Test Standard(s):47 CFRPart 15.247 Test Result:Pass Dateof Receipt:Nov. 26, 2025 Test Date:Nov. 27, 2025- Dec.10, 2025 Dateof Issue:Dec.15, 2025 ISSUEDBY: SHENZHENEU TESTINGLABORATORYLIMITED Preparedby:Reviewedand Approvedby: LandonQiu/ EngineerSallyZhang/Manager Page2 of 89ReportNo.: 8336EU122621W TRF Version:A01 RevisionRecord ReportVersionIssuedDateDescriptionStatus V0Dec.15, 2025OriginalValid Page3 of 89ReportNo.: 8336EU122621W TRF Version:A01 Tableof Contents 1COVERPAGE...................................................................................................................................................1 2GENERALINFORMATION........................................................................................................................5 2.1APPLICANTINFORMATION...................................................................................................................5 2.2MANUFACTURERINFORMATION...........................................................................................................5 2.3FACTORYINFORMATION......................................................................................................................5 2.4GENERALDESCRIPTIONOFE.U.T......................................................................................................5 2.5TECHNICALINFORMATIONOFE.U.T....................................................................................................6 3TESTSUMMARY.......................................................................................................................................7 3.1TESTSTANDARD................................................................................................................................7 3.2TESTVERDICT...................................................................................................................................7 3.3TESTLABORATORY............................................................................................................................8 4TESTCONFIGURATION...........................................................................................................................9 4.1TESTENVIRONMENT...........................................................................................................................9 4.2TESTEQUIPMENT...............................................................................................................................9 4.3DESCRIPTIONOFSUPPORTUNIT......................................................................................................11 4.4TESTMODE.....................................................................................................................................11 4.5DESCRIPTIONOFCALCULATION........................................................................................................11 4.5.1FieldStrengthCalculation..................................................................................................11 4.5.2DisturbanceCalculation.....................................................................................................11 4.6MEASUREMENTUNCERTAINTY..........................................................................................................11 4.7DEVIATIONFROMSTANDARDS..........................................................................................................12 4.8ABNORMALITIESFROMSTANDARDCONDITION..................................................................................12 5EVALUATIONRESULTS(EVALUATION)..............................................................................................13 5.1ANTENNAREQUIREMENT..................................................................................................................13 5.1.1Test Specification...............................................................................................................13 5.1.2Test Data ............................................................................................................................13 6RADIOSPECTRUMMATTERTESTRESULTS(RF) ............................................................................14 6.1CONDUCTEDEMISSIONATACPOWERLINE......................................................................................14 6.1.1Test Specification...............................................................................................................14 6.1.2E.U.T.Operation.................................................................................................................14 6.1.3Test SetupDiagram...........................................................................................................14 6.1.4Test Data ............................................................................................................................14 6.220DB BANDWIDTH...........................................................................................................................17 6.2.1Test Specification...............................................................................................................17 6.2.2E.U.T.Operation.................................................................................................................17 6.2.3Test SetupDiagram...........................................................................................................18 6.2.4Test Data ............................................................................................................................18 6.3MAXIMUMCONDUCTEDOUTPUTPOWER...........................................................................................19 6.3.1Test Specification.....................…

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2.4GHz1608ChipAntenna:RANT1608F245C04 _ Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT1608F245C04 (A)(B)(C)(D)(E)(F) ElectricalSpecification DimensionandTerminalConfiguration No.TerminalName 1Feeding/GNG 2GND/Feeding (A)ProductTypeChipAntenna (B)SizeCode 1.6x0.8mm( ± 0.1mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=04 WorkingFrequencyRange2400~2500MHz Bandwidth120MHz(Min.) PeakGain2.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280 °C ) TerminationNi/Au(Leadless) Dimension(mm) L 1.60±0.10 W 0.80 ± 0.10 T 0.80 ± 0.10 Add:Room 707, Building F, Tongan Zhichuangyuan, xixiang street, Baoan District, Shenzhen. 2.4GHz1608ChipAntenna:RANT1608F245C04 _ 1 EvaluationBoardReference PCBDimensionAntennaLayoutReference Unit:mm ElectricalCharacteristics ReturnLoss&Radiation ELECTRICALCHARACTERISTICSS11 Radiation ElectricalCharacteristics Freque ncy EfficPercenGain 2400-1.6472.27%2.38 2450-1.3375.34%2.7 2500-1.5972.98%2.59 Add:Room 707, Building F, Tongan Zhichuangyuan, xixiang street, Baoan District, Shenzhen. 2.4GHz1608ChipAntenna:RANT1608F245C04 _ TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 16087”4K/Reel 4.0±0.5 4.0±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTψDP PaperType1608 1.90±0.203.50±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.10 1.50±0.10 4.0±0.1 Add:Room 707, Building F, Tongan Zhichuangyuan, xixiang street, Baoan District, Shenzhen. 2.4GHz1608ChipAntenna:RANT1608F245C04 _ ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 Add:Room 707, Building F, Tongan Zhichuangyuan, xixiang street, Baoan District, Shenzhen. 2.4GHz 1 6 0 8 Chip Antenna: RANT1608F245C04 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12019/03/01NewDatasheet 22020/02/22Add2Dradiationcharacteristic Add:Room 707, Building F, Tongan Zhichuangyuan, xixiang street, Baoan District, Shenzhen.