2BTR9-X4CXTEINK X4 Classic

ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity, GuanlanStreet,LonghuaDistrict,Shenzhen,China Date:2026-07-16 FederalCommunicationsCommission AuthorizationandEvaluationDivision 1435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BTR9-X4C FCCApplicationforFRN:0037772233 ShenzhenXiaohuXingtongTechnologyCo.,Ltd.certifiesthat,asofthedateofthefilingof theapplication,HOPEKCORPORATIONINCisourdesignatedU.S.agentforserviceof processfortheabovereferencedFCCID.ShenzhenXiaohuXingtongTechnologyCo.,Ltd. acceptstomaintainanagentfornolessthanoneyearafterthegranteehasterminatedall marketingandimportationortheconclusionofanyCommission-relatedproceedinginvolving theequipment. HOPEKCORPORATIONINCaccepts,asofthedateofthefilingoftheapplication,the obligationofthedesignatedU.S.agentforserviceofprocessfortheabovereferencedFCC ID. DesignatedU.S.AgentInformation: Name:HOPEKCORPORATIONINC Address:16755CoyoteBushDrUnit84,SanDiego,CA92127UnitedStates FRN：0034562900 ContactPerson:YangyangXu Tel.:(561)875-9826 Email:[email protected] Sincerely, SignedonbehalfofShenzhenXiaohu XingtongTechnologyCo.,Ltd. SignedonbehalfofHOPEKCORPORATION INC Name:ChenChuName:YangyangXu Title:Title: Date:2026-07-16Date:2026-07-16

Rev1/26/2023 ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity,Guanlan Street,LonghuaDistrict,Shenzhen,China FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:07-14-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BTR9-X4C ShenzhenXiaohuXingtongTechnologyCo.,Ltd.certifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. ShenzhenXiaohuXingtongTechnologyCo.,Ltd.certifiesthattheequipmentforwhichauthorizationis soughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc. oranyofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyof itssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB 986446D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, ChenChu Rev1/26/2023 ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity,Guanlan Street,LonghuaDistrict,Shenzhen,China FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:07-14-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BTR9-X4C ShenzhenXiaohuXingtongTechnologyCo.,Ltd.certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofits subsidiariesoraffiliates)asanentityproducing“covered”equipment. Sincerely, HaoWang

ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity, GuanlanStreet,LonghuaDistrict,Shenzhen,China Date：07/14/2026 ProductModelNumber:XTEINKX4Classic FCCID ： 2BTR9-X4C Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title: Email:[email protected] Telephone:13538214502 Onbehalfof:ShenzhenXiaohuXingtongTechnologyCo.,Ltd.

ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity, GuanlanStreet,LonghuaDistrict,Shenzhen,China OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:July15,2026 Subject;RequestforConfidentiality FCCID:2BTR9-X4C ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram OperationalDescription Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); TestSetupPhotos InternalPhotos UserManual ExternalPhotographs For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:ChenChu Title:

FCCID:2BTR9-X4C Label Labelsize:3cm*1.5cm Labelfont:Arial FCCID:2BTR9-X4C

RFExposureevaluation FCCID 2BTR9-X4C ProductName XTEINKX4Classic Model/Type reference XTEINKX4Classic 1.Reference ANSIC95.1-2019:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadio FrequencyElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortable DevicesRFExposureProceduresandEquipmentAuthorizationPolicies. FCCCFR47part11.1310:Radiofrequencyradiationexposurelimits. FCCCFR47part22.1093:Radiofrequencyradiationexposureevaluation:portabledevices 2.Requirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06Section4.3.1Standalone SARtestexclusionconsiderations:“UnlessspecificallyrequiredbythepublishedRFexposure KDBprocedures,standalone1-gheadorbodyand10-gextremitySARevaluationforgeneral populationexposureconditions,bymeasurementornumericalsimulation,isnotrequired whenthecorrespondingSARTestExclusionThresholdcondition,listedbelow,issatisfied. Thesetestexclusionconditionsarebasedonsource-basedtime-averagedmaximum conductedoutputpoweroftheRFchannelrequiringevaluation,adjustedfortune-uptolerance, andtheminimumtestseparationdistancerequiredfortheexposureconditions.22The minimumtestseparationdistanceisdeterminedbythesmallestdistancefromtheantenna andradiatingstructuresoroutersurfaceofthedevice,accordingtothehostformfactor, exposureconditionsandplatformrequirements,toanypartofthebodyorextremityofauser orbystander(see5)ofsection4.1).ToqualifyforSARtestexclusion,thetestseparation distancesappliedmustbefullyexplainedandjustifiedbytheoperatingconfigurationsand exposureconditionsofthetransmitterandapplicablehostplatformrequirements,typicallyin theSARmeasurementorSARanalysisreport,accordingtotherequiredpublishedRF exposureKDBprocedures.WhennootherRFexposuretestingorreportingisrequired,a statementofjustificationandcompliancemustbeincludedintheequipmentapproval,inlieuof theSARreport,toqualifyfortheSARtestexclusion.Whenrequired,thedevicespecific conditionsdescribedintheotherpublishedRFexposureKDBproceduresmustbesatisfied beforeapplyingtheseSARtestexclusionprovisions;forexample,handheldPTTtwo-way radios,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≤50 mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmaccordingto5)insection4.1isappliedto determineSARtestexclusion. Whenoneofthefollowingtestexclusionconditionsissatisfiedforallcombinationsof simultaneoustransmissionconfigurations,furtherequipmentapprovalisnotrequiredto incorporatetransmittermodulesinhostdevicesthatoperateinthemixedmobileandportable hostplatformexposureconditions.Thegranteeisresponsiblefordocumentingthisaccording toClassIpermissivechangerequirements.AntennasthatqualifyforstandaloneSARtest exclusionmustapplytheestimatedstandaloneSARtodeterminesimultaneoustransmission testexclusion. a)The[∑of(thehighestmeasuredorestimatedSARforeachstandaloneantenna configuration,adjustedformaximumtune-uptolerance)/1.6W/kg]+[∑ofMPEratios]is≤ 1.0. b)TheSARtopeaklocationseparationratiosofallsimultaneouslytransmittingantennapairs operatinginportabledeviceexposureconditionsareall≤0.04,andthe[∑ofMPEratios]is ≤1.0. 3.ConductedOutputPower ModulationPacketTypeChannel PeakOutput Power (dBm) PeakOutput Power (mW) GFSK BLE1M 0-0.870.82 19-1.420.72 39-0.730.85 BLE2M 0-2.420.57 19-1.310.74 39-0.740.84 WiFi2.4G Modulation Channel OutputPower (dBm) OutputPower (mW) 802.11b 1 4.292.69 6 4.142.59 11 3.642.31 802.11g 1 3.622.30 6 3.512.24 11 3.022.00 802.11n (HT20) 1 2.371.73 6 2.291.69 11 1.801.51 802.11n (HT40) 3 1.521.42 6 1.451.40 9 1.601.45 4.ManufacturingTolerance BLE ChannelChannel0Channel19Channel39 Target(dBm)0-10 Tolerance±(dB)1.01.01.0 WiFi2.4G ChannelChannel1 Channel6 Channel11 Target(dBm) 443 Tolerance±(dB) 1.0 1.01.0 Channel Channel3Channel6Channel9 Target(dBm) 111 Tolerance±(dB) 1.01.01.0 5.EvaluationResult Band/Modef(GHz) Antenna Distance (mm) RFoutputpower SARTest Exclusion Threshold SARTest Exclusion dBmmW BLE2.48051 1.26 0.39<3.0Yes WIFI2.4G2.41255 3.16 0.98<3.0Yes Remark: 1.Outputpowerincludingtuneuptolerance; 2.Whentheminimumtestseparationdistanceis<5mm,adistanceof5mmaccordingtof)in section4.1isappliedtodetermineSARtestexclusion. 6.Conclusion ThemeasurementresultscomplywiththeFCCLimitper47CFR2.1093fortheuncontrolled RFExposureandSARExclusionThresholdperKDB447498v06. ------Endofthereport------

http://www.BDS666.com -1-ShenzhenJinhangbiaoElectronicsCo.,Ltd. ProductTechnicalSpecificationDocument SPECIFICATION RoomC809,BlockC,ZhantaoTechnologyBuilding,No.1079Minzhi Avenue,LonghuaDistrict,ShenzhenTel:0755-83040901Fax:0755-83040901 Preparedby: Checkedby: ApprovedBy: SampleSubmissionDate:FormedOn ProductVersion|DocumentVersion (V1.2) Product Model Part No.:KH3216-A35 Internal Antenna Customer Confirmation: Approved by: Confirmation Date: Approved Date: ShenzhenJinhangbiaoElectronicsCo.,Ltd. http://www.BDS666.com -2-ShenzhenJinhangbiaoElectronicsCo.,Ltd. catalogue Tableofcontents SpecificationDocumentVersionChangeHistory(VersionRejectionRecord) ...3 1.IntroductionOverview...............................................................4 2.Externaldimensionsandtestboardpaddimensions(Dimensions) ......4～5 3.TestCircuitandMatchingCircuit:EvaluationBoardandMatchingCircuits...5 4.ElectricalProperties..................................................................6 5.CharacteristicCurve..................................................................6 6.DirectionalMap:RadiationPattern .............................................7～8 7.Allowableerrorafterreliabilitytesting:Post-ReliabilityTolerance............9 8.ReliabilityTest(DependabilityTest)..........................................9～10 9.Reflowsolderingtemperature–Standardconditionsforreflowsoldering...10 10.PackagingSize:DimensionsandSpecifications.................................11 http://www.BDS666.com -3-ShenzhenJinhangbiaoElectronicsCo.,Ltd. ProductSpecificationDocumentVersionChangeHistory VersionHistoryTrackRecord Version Number ChangeRecordRejigger Drafted Approve DateDate V1.0InitialissueYaoFuxinHeJunju2015.12.25 V1.1ChangeproductsizetolerancevalueSingChenHeJunju2017.05.24 V1.2 Amendthecontentofthereliabilitytestdescriptionsinsections8.1to8.4 YaoFuxinHeJunju2017.11.07 Remarks： 1、Whenmodifyingaproduct'selectricalperformancespecifications,theversionnumbermustbeupdated(e.g.,from V1.0toV2.0,V3.0,etc.). 2、Whenchangingproducttestingmethods(includingreliabilitytestconditions)orusageconditions,updatethe versionnumberwithaseriessuffix(e.g.,V1.0toV1.1,V1.2,etc.). http://www.BDS666ShenzhenJinhangbiaoElectronicsCo.,Ltd..com 1OverviewINTRODUCTION JinhangbiaoMicrowaveMultilayerCeramicAntennaLASeriesisdesignedforcompactSMD chipapplicationsinWLAN,WiFi,Bluetooth,PHS,mobilemulti-frequencyantennas,FMsystems,and otherscenarios. kinghelmMicrowaveMulti-LayerCeramicAntennaLAseriesaredesignedtobe usedin WLAN、WiFi、Bluetooth、PHS、Multiple-bandMobilephoneantenna,FM,etcandcompact sizeSMDchipdesign. 2.ExternalDimensionsDimensions(Unit: TechnicalDetails http://www.BDS666ShenzhenJinhangbiaoElectronicsCo.,Ltd..com 3.TestCircuitandMatchingCircuitEvaluationBoardandMatchingCircuits 4.ElectricalPerformanceElectricalCharacteristics No. Item(Project)Specifications(Characteristics) 4.1 CentralFrequency(Nomatchfound) 2875MHz (Withmatchingcircuittest)AfterMatching 2450MHz 4.2 BandWidth:Passbandwidth 100MHztyp. 4.3 PeakGain:Peakgain 4. 2.30 dBi 4 V.S.W.RStandingWaveRatio ≤2.0 4.5 PolarizationMethod Linear 4.6 AzimuthBeamWidth(azimuthangle) Omni-directional 4.7 Impedance 50Ω 6.2n 1.8n TechnicalDetails http://www.BDS666.com -6-ShenzhenJinhangbiaoElectronicsCo.,Ltd. 5.CharacteristicCurve 6.DirectionDiagramRadiationPattern coordinates： http://www.BDS666.com -7-ShenzhenJinhangbiaoElectronicsCo.,Ltd. X-ZPlane Y-ZPlane X-YPlane http://www.BDS666.com -8-ShenzhenJinhangbiaoElectronicsCo.,Ltd. 3DRadiationPattern Frequency (MHz) 240024502500 Avg.Gain (dBi) -0.23-0.36-0.51 PeckGain (dBi) 1.98 2.30 1.55 Efficiency (%) 7071.269 http://www.BDS666.com -9-ShenzhenJinhangbiaoElectronicsCo.,Ltd. 7.Allowableerrorafterreliabilitytesting(Post-ReliabilityTolerance):The allowabledeviationsfromtheinitialreadingafterreliabilitytestingareshowninthetable below PostDependabilityTolerance(Refertothetable) 8.ReliabilityTestDependabilityTest BaseConditions:TemperatureRange 25±5°C Relativehumidityrange 55~75%RH OperatingTemperatureRange:-40°Cto+85°C 8.1Vibration-ResistantVibrationResistance AftervibratingalongtheX,Y,andZaxesfor2hourseachatafrequencyof10–55Hzwithanamplitude of1.5mm,thetestresultscomplywiththespecificationsinTables8.1–8.4. Thedeviceshouldsatisfytheelectricalcharacteristicsspecifiedinparagraph8.1~8.4afterappliedto the vibrationof10to55Hzwithamplitudeof1.5mmfor2hourseachinX,YandZdirections. 8.2FallandImpactResistanceDropShock Afterbeingfreelydroppedthreetimesontothewoodenfloorfromaheightof100cmalongtheX,Y,and Zaxesrespectively,thetestresultscomplywiththespecificationsoutlinedinTables8.1–8.4. Thedeviceshouldsatisfytheelectricalcharacteristicsspecifiedinparagraph8.1~8.4afterdropping onto thehardwoodenboardfromtheheightof100cmfor3timeseachfacetofthe3dimensionsofthedevice. 8.3WeldingHeat-ResistantSolderHeatProof Thematerialcanwithstandpreheatingat120–150°Cfor120seconds,followedbysolderimmersionat255° C±10°Cfor5±0.5secondsorsolderingwithasolderingironat300°C±10°Cfor3±0.5secondswithoutany damagetotheweldsurface. Thedeviceshouldbesatisfiedafterpreheatingat120°C~150°Cfor120secondsanddippingin solderingSnat255°C+10°Cfor5±0.5seconds，orelectriciron300°C-10°Cfor3±0.5seconds， withoutdamnify. 8.4BondStrengthTestTensileStrengthofTerminal Theproduct'selectrodeterminalsorsurfacemustwithstandaverticalpullingforceof1kgfor10±1seconds. Thedeviceshouldnotbebrokenaftertensileforceof1.0kgisslowlyappliedtopullaleadpinofthe fixeddeviceintheleadaxisdirectionfor10±1seconds. No. Item(Project) Post-ReliabilityTolerance(allowableadditio- nalerrorafterreliabilitytesting) 7.1 CentralFrequency ±5MHz 7.2 BandWidth:Passbandwidth ±5MHz 7.3 Gaingain ±0.1dBi 7.4 V.S.W.R.(inBW):StandingWaveRatio ±0.1 http://www.BDS666.com-10-ShenzhenJinhangbiaoElectronicsCo.,Ltd. 8.5BendingResistanceTest Weldtheproductontothecenterofa1.6±0.2mmPCBboardasshowninthediagram,applying forceinthedirectionindicatedbythearrowatarateof1mm/sforabendingdistanceof1.5mm, holdingfor5±1seconds;themetallayeroftheproductmustremainintactwithoutdetachment. Weldt…

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ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26052526EE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of56 TESTREPORT Applicant:ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Address: Room1209,YichuangInternationalCenter,Building2B,No.8,Golf Avenue,GuangpeiCommunity,GuanlanStreet,LonghuaDistrict, Shenzhen,China Manufacturer: ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Address: Room1209,YichuangInternationalCenter,Building2B,No.8,Golf Avenue,GuangpeiCommunity,GuanlanStreet,LonghuaDistrict, Shenzhen,China ProductName:XTEINKX4Classic ModelNumber:XTEINKX4Classic Trademark:N/A FCCID:2BTR9-X4C TestDate: May20,2026-Jul.08,2026 DateofReport: Jul.08,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor.1-2023+C63.10a-2024+Erratato C63.10a-2024 Preparedby(TestEngineer): StenHuang Approved(Manager): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26052526EE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of56 TABLEOFCONTENT 1.GeneralInformation......................................................................................5 1.1.DescriptionofDevice(EUT).......................................................................................................................5 1.2.ChannelList..................................................................................................................................................5 1.3.Summaryoftestresult................................................................................................................................6 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................6 1.5.Testmode......................................................................................................................................................6 1.6.BlockDiagram...............................................................................................................................................7 1.7.TestConditions.............................................................................................................................................7 1.8.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................7 1.9.TestFacility....................................................................................................................................................8 1.10.TestEquipment...........................................................................................................................................9 2.Conductedemissionatthemainsterminalstest....................................11 2.1.Limit..............................................................................................................................................................11 2.2.TestSetup....................................................................................................................................................11 2.3.TestProcedure............................................................................................................................................11 2.4.TestResult...................................................................................................................................................12 3.RadiatedSpuriousEmissions...................................................................14 3.1.Limit..............................................................................................................................................................14 3.2.TestSetup....................................................................................................................................................15 3.3.TestProcedure............................................................................................................................................17 3.4.TestResult...................................................................................................................................................18 4.ConductedSpuriousEmissions................................................................23 4.1.Limit..............................................................................................................................................................23 4.2.TestSetup....................................................................................................................................................23 4.3.TestProcedure............................................................................................................................................23 4.4.TestResult...................................................................................................................................................23 5.BandEdgeMeasurement...........................................................................30 5.1.Limit..............................................................................................................................................................30 5.2.Testsetup....................................................................................................................................................30 5.3.TestProcedure............................................................................................................................................30 5.4.TestResult...................................................................................................................................................30 6.-6dBBandwidthand99%BandwidthMeasurement..............................35 6.1.Limit............................…

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ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26052526EE-2 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of36 TESTREPORT Applicant:ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Address: Room1209,YichuangInternationalCenter,Building2B,No.8,Golf Avenue,GuangpeiCommunity,GuanlanStreet,LonghuaDistrict, Shenzhen,China Manufacturer: ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Address: Room1209,YichuangInternationalCenter,Building2B,No.8,Golf Avenue,GuangpeiCommunity,GuanlanStreet,LonghuaDistrict, Shenzhen,China ProductName:XTEINKX4Classic ModelNumber:XTEINKX4Classic Trademark:N/A FCCID:2BTR9-X4C TestDate:May20,2026toJul.08,2026 DateofReport: Jul.08,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor.1-2023+C63.10a-2024+Erratato C63.10a-2024 Preparedby(TestEngineer): StenHuang Reviewer(Supervisor): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26052526EE-2 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of36 TABLEOFCONTENT 1.GeneralInformation......................................................................................4 1.1.DescriptionofDevice(EUT).......................................................................................................................4 1.2.ChannelList..................................................................................................................................................5 1.3.Summaryoftestresult................................................................................................................................5 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................5 1.5.Testmode......................................................................................................................................................5 1.6.BlockDiagram...............................................................................................................................................7 1.7.TestConditions.............................................................................................................................................6 1.8.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................7 1.9.TestFacility....................................................................................................................................................7 1.10.TestEquipment...........................................................................................................................................7 2.Conductedemissionatthemainsterminalstest....................................10 2.1.Limit..............................................................................................................................................................10 2.2.TestSetup....................................................................................................................................................10 2.3.TestProcedure............................................................................................................................................10 2.4.TestResult...................................................................................................................................................11 3.RadiatedSpuriousEmissions...................................................................11 3.1.Limit..............................................................................................................................................................13 3.2.TestSetup....................................................................................................................................................14 3.3.TestProcedure............................................................................................................................................16 3.4.TestResult...................................................................................................................................................17 4.ConductedSpuriousEmissions................................................................29 4.1.Limit..............................................................................................................................................................29 4.2.TestSetup....................................................................................................................................................29 4.3.TestProcedure............................................................................................................................................29 4.4.TestResult...................................................................................................................................................29 5.BandEdgeMeasurement...........................................................................30 5.1.Limit..............................................................................................................................................................30 5.2.Testsetup....................................................................................................................................................30 5.3.TestProcedure............................................................................................................................................30 5.4.TestResult...................................................................................................................................................30 6.-6dBBandwidthand99%BandwidthMeasurement..............................31 6.1.Limit.........................…

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FCCID:2BTR9-X4C 1.DutyCycle 1.1TestResult 1.1.1Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) DutyCycle (%) DutyCycle CorrectionFactor(dB) Max.DC Variation(%) 802.11bSISO 241232.95332.99099.890.000.03 243732.95332.99099.890.000.00 246232.95332.99099.890.000.03 802.11gSISO 24125.4845.51899.380.030.00 24375.4845.51899.380.030.00 24625.4845.51899.380.030.00 802.11n (HT20) SISO 24125.0795.11499.320.030.04 24375.0795.11599.300.030.04 24625.0795.11399.340.030.00 802.11n (HT40) SISO 24222.4682.50398.600.060.03 24372.4682.50298.640.060.03 24522.4692.50498.600.060.03 FCCID:2BTR9-X4C 1.2TestGraph 1.2.1Ant1 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4C 2.Bandwidth 2.1TestResult 2.1.1OBW Mode TX Type Frequency (MHz) ANT 99%OccupiedBandwidth(MHz) Verdict ResultLimit 802.11bSISO 2412112.885/Pass 2437112.890/Pass 2462112.863/Pass 802.11gSISO 2412116.305/Pass 2437116.275/Pass 2462116.298/Pass 802.11n (HT20) SISO 2412117.1…

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