2BTR9-X4LXTEINK X4 Light

ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity, GuanlanStreet,LonghuaDistrict,Shenzhen,China Date:2026-08-05 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BTR9-X4L 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: Chen Chu Title:Manager Date: 2026-08-05 Name: Yangyang Xu Title:Manager Date: 2026-08-05

Rev1/26/2023 ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity,Guanlan Street,LonghuaDistrict,Shenzhen,China FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:08-06-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BTR9-X4L 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:08-06-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BTR9-X4L ShenzhenXiaohuXingtongTechnologyCo.,Ltd.certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofits subsidiariesoraffiliates)asanentityproducing“covered”equipment. Sincerely, ChenChu

ShenzhenXiaohuXingtongTechnologyCo.,Ltd. Room1209,YichuangInternationalCenter,Building2B,No.8,GolfAvenue,GuangpeiCommunity, GuanlanStreet,LonghuaDistrict,Shenzhen,China Date：08/06/2026 ProductModelNumber:XTEINKX4Light FCCID ： 2BTR9-X4L 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:August6,2026 Subject;RequestforConfidentiality FCCID:2BTR9-X4L 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 For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:ChenChu Title:

FCCID:2BTR9-X4L Photo1 Photo2 FCCID:2BTR9-X4L Photo3 Photo4 FCCID:2BTR9-X4L Photo5 Photo6 FCCID:2BTR9-X4L Photo7 Photo8 FCCID:2BTR9-X4L Photo9

FCCID:2BTR9-X4L Label Labelsize:2cm*1cm Labelfont:Arial FCCID:2BTR9-X4L

RFExposureevaluation FCCID 2BTR9-X4L ProductName XTEINKX4Light Model/Type reference XTEINKX4Light 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 BLE 1M 0-3.810.42 19-3.460.45 39-3.730.42 BLE 2M 0-3.850.41 19-3.490.45 39-3.720.42 WiFi2.4G Modulation Channel OutputPower (dBm) OutputPower (mW) 802.11b 1 7.595.74 6 8.136.50 11 7.635.79 802.11g 1 7.715.90 6 7.946.22 11 7.535.66 802.11n (HT20) 1 7.585.73 6 7.846.08 11 7.395.48 802.11n (HT40) 3 8.106.46 6 7.856.10 9 7.725.92 4.ManufacturingTolerance BLE BLE1M ChannelChannel0Channel19Channel39 Target(dBm)-3-3-3 Tolerance±(dB)1.01.01.0 BLE2M ChannelChannel0Channel19Channel39 Target(dBm)-3-3-3 Tolerance±(dB)1.01.01.0 WiFi2.4G 11B ChannelChannel1 Channel6 Channel11 Target(dBm) 787 Tolerance±(dB) 1.0 1.01.0 11G ChannelChannel1 Channel6 Channel11 Target(dBm) 777 Tolerance±(dB) 1.0 1.01.0 11N20 ChannelChannel1 Channel6 Channel11 Target(dBm) 777 Tolerance±(dB) 1.0 1.01.0 11N40 Channel Channel3Channel6Channel9 Target(dBm) 877 Tolerance±(dB) 1.01.01.0 5.EvaluationResult Band/Modef(GHz) Antenna Distance (mm) RFoutputpower SARTest Exclusion Threshold SARTest Exclusion dBmmW BLE2.4805-2 0.63 0.1972<3.0Yes WIFI2.4G2.42259 7.94 2.4724<3.0Yes Remark: 1.Outputpowerincludingtuneuptolerance; 2.Whentheminimumtestseparationdistanceis<5mm,adistanceof5mmaccordingtof)in section4.1isappliedtodetermineSARtestexclusion. 6.Conclusion ThemeasurementresultscomplywiththeFCCLimitper47CFR2.1093fortheuncontrolled RFExposureandSARExclusionThresholdperKDB447498v06. ------Endofthereport------

ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26074010GE-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:XTEINKX4Light ModelNumber:XTEINKX4Light Trademark:N/A FCCID:2BTR9-X4L TestDate: Jul.20,2026-Aug.03,2026 DateofReport: Aug.03,2026 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.:BKC26074010GE-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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FCCID:2BTR9-X4L 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 24128.3838.42099.560.020.04 24378.3838.42099.560.020.04 24628.3838.42099.560.020.04 802.11gSISO 24121.3941.43797.010.130.03 24371.3941.43797.010.130.03 24621.3941.43697.080.130.00 802.11n (HT20) SISO 24121.3021.34496.880.140.03 24371.3021.34496.880.140.03 24621.3021.34496.880.140.03 802.11n (HT40) SISO 24220.6500.69393.800.280.03 24370.6500.69293.930.270.03 24520.6500.69393.800.280.03 FCCID:2BTR9-X4L 1.2TestGraph 1.2.1Ant1 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 2.Bandwidth 2.1TestResult 2.1.1OBW Mode TX Type Frequency (MHz) ANT 99%OccupiedBandwidth(MHz) Verdict ResultLimit 802.11bSISO 2412112.746/Pass 2437112.838/Pass 2462112.234/Pass 802.11gSISO 2412116.469/Pass 2437116.577/Pass 2462116.177/Pass 802.11n (HT20) SISO 2412117.560/Pass 2437117.714/Pass 2462117.303/Pass 802.11n (HT40) SISO 2422135.436/Pass 2437136.836/Pass 2452136.276/Pass 2.1.26dBBW Mode TX Type Frequency (MHz) ANT 6dBBandwidth(MHz) Verdict ResultLimit 802.11bSISO 241218.165>=0.5Pass 243718.624>=0.5Pass 246217.671>=0.5Pass 802.11gSISO 2412115.788>=0.5Pass 2437116.244>=0.5Pass 2462114.069>=0.5Pass 802.11n (HT20) SISO 2412116.385>=0.5Pass 2437117.296>=0.5Pass 2462114.137>=0.5Pass 802.11n (HT40) SISO 2422123.287>=0.5Pass 2437136.269>=0.5Pass 2452127.616>=0.5Pass FCCID:2BTR9-X4L 2.2TestGraph 2.2.1OBW 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 2.2.26dBBW 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 3.MaximumConductedOutputPower 3.1TestResult 3.1.1Power Mode TX Type Frequency (MHz) MaximumAverageConductedOutputPower(dBm) Verdict ANT1Limit 802.11bSISO 24127.59<=30Pass 24378.13<=30Pass 24627.63<=30Pass 802.11gSISO 24127.71<=30Pass 24377.94<=30Pass 24627.53<=30Pass 802.11n (HT20) SISO 24127.58<=30Pass 24377.84<=30Pass 24627.39<=30Pass 802.11n (HT40) SISO 24228.10<=30Pass 24377.85<=30Pass 24527.72<=30Pass Note1:AntennaGain:Ant1:5.19dBi; FCCID:2BTR9-X4L 3.2TestGraph 3.2.1Power 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 4.MaximumPowerSpectralDensity 4.1TestResult 4.1.1PSD Mode TX Type Frequency (MHz) MaximumPSD(dBm) Verdict ANT1Limit(dBm/3kHz) 802.11bSISO 2412-8.88dBm/100kHz<=8Pass 2437-8.37dBm/100kHz<=8Pass 2462-8.61dBm/100kHz<=8Pass 802.11gSISO 2412-11.57dBm/100kHz<=8Pass 2437-11.51dBm/100kHz<=8Pass 2462-10.57dBm/100kHz<=8Pass 802.11n (HT20) SISO 2412-11.65dBm/100kHz<=8Pass 2437-11.59dBm/100kHz<=8Pass 2462-11.08dBm/100kHz<=8Pass 802.11n (HT40) SISO 2422-12.49dBm/100kHz<=8Pass 2437-14.23dBm/100kHz<=8Pass 2452-13.45dBm/100kHz<=8Pass Note1:AntennaGain:Ant1:5.19dBi; FCCID:2BTR9-X4L 4.2TestGraph 4.2.1PSD 802.11b_LCH_2412MHz_Ant1(SISO)_NTNV 802.11b_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11b_HCH_2462MHz_Ant1(SISO)_NTNV 802.11g_LCH_2412MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11g_MCH_2437MHz_Ant1(SISO)_NTNV 802.11g_HCH_2462MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_LCH_2412MHz_Ant1(SISO)_NTNV 802.11n(HT20)_MCH_2437MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT20)_HCH_2462MHz_Ant1(SISO)_NTNV 802.11n(HT40)_LCH_2422MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 802.11n(HT40)_MCH_2437MHz_Ant1(SISO)_NTNV 802.11n(HT40)_HCH_2452MHz_Ant1(SISO)_NTNV FCCID:2BTR9-X4L 5.UnwantedEmissionsInNon-restrictedFrequencyBands 5.1TestResult 5.1.1Ref Mode TX Type Frequency (MHz) ANT LevelofReference (dBm) 802.11bSISO 24121-0.22 243710.36 24621-0.08 802.11gSISO 24121-2.37 24371-2.55 24621-1.56 802.11n (HT20) SISO 24121-2.20 24371-2.75 24621-1.43 802.11n (HT40) SISO 24221-2.96 24371-4.95 24521-3.85 5.1.2CSE Mode TX Type Frequency (MHz) ANT LevelofReference (dBm) Limit (dBm) Verdict 802.11bSISO 24121-0.22-30.22Pass 243710.36-29.64Pass 24621-0.08-30.08Pass 802.11gSISO 24121-2.37-32.37Pass 24371-2.55-32.55Pass 24621-1.56-31.56Pass 802.11n (HT20) SISO 24121-2.20-32.20Pass 24371-2.75-32.75Pass 24621-1.43-31.43Pass 802.11n (HT40) SISO 24221-…

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ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26074010GE-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:XTEINKX4Light ModelNumber:XTEINKX4Light Trademark:N/A FCCID:2BTR9-X4L TestDate:Jul.20,2026toAug.03,2026 DateofReport: Aug.03,2026 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.:BKC26074010GE-2 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of36 TABLEOFCONTENT 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...............................................................................................................................................6 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...................................................................13 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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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...........................................…

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