2BVV3-UBDSchameleon ultra

CHANGCHUNXINHEDIANZIYOUXIANGONGSI Address ： Room401,Building1,AnhuaMeijun,2988SoutheastLakeAvenue,Economic DevelopmentZone,ChangchunCity,JilinProvince,China FRN:0038354304 Date:2026-05-09 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BVV3-UBDS CHANGCHUNXINHEDIANZIYOUXIANGONGSIcertifiesthat,asofthedateofthefilingof theapplication,XINNAISIINCisourdesignatedU.S.agentforserviceofprocessforthe abovereferencedFCCID.CHANGCHUNXINHEDIANZIYOUXIANGONGSIacceptsto maintainanagentfornolessthanoneyearafterthegranteehasterminatedallmarketing andimportationortheconclusionofanyCommission-relatedproceedinginvolvingthe equipment. XINNAISIINCaccepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:XINNAISIINC Address:1500NGRANTSTSTER,DENVER,CO80203 FRN:0037518289 ContactPerson:KiKi Tel.:+01(951)893-3011 Email:[email protected] Sincerely, Signedonbehalfof CHANGCHUNXINHEDIANZIYOUXIANGONGSI SignedonbehalfofXINNAISIINC Name:Name: Title:ManagerTitle:Manager Date:2026-05-09Date:2026-05-09

Rev9/15/2025 CHANGCHUNXINHEDIANZIYOUXIANGONGSI FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:May07,2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BVV3-UBDS CHANGCHUNXINHEDIANZIYOUXIANGONGSIcertifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. CHANGCHUNXINHEDIANZIYOUXIANGONGSIcertifiesthattheequipmentforwhichauthorizationis soughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc. oranyofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyof itssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB 986446D01CoveredEquipmentGuidancesectionB(2a). █Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, XIAOLU CHANGCHUNXINHEDIANZIYOUXIANGONGSI Rev9/15/2025 CHANGCHUNXINHEDIANZIYOUXIANGONGSI FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:May07,2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BVV3-UBDS CHANGCHUNXINHEDIANZIYOUXIANGONGSIcertifiesthat,asofthedateofthefilingoftheapplication, theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiaries oraffiliates)asanentityproducing“covered”equipment. Sincerely, XIAOLU CHANGCHUNXINHEDIANZIYOUXIANGONGSI

CHANGCHUNXINHEDIANZIYOUXIANGONGSI Date：May07,2026 ProductModelNumber:chameleonultra/Ultrablackdropperstyle FCCID ： 2BVV3-UBDS Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title:XIAOLU Email:[email protected] Telephone:18122050760 Onbehalfof:CHANGCHUNXINHEDIANZIYOUXIANGONGSI.

CHANGCHUNXINHEDIANZIYOUXIANGONGSI OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:May7,2026 Subject;RequestforConfidentiality FCCID:2BVV3-UBDS ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. █SchematicDiagram █BlockDiagram PartsList █OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); █ExternalPhotos █TestSetupPhotos █InternalPhotos █UserManual █For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:XIAOLU Title:Manager

LabelandLabelLocation FCCID:2BVV3-UBDS Size:8mm*4mm

FCCID:2BVV3-UBDS RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093，Unlessspecifically requiredbythepublishedRFexposureKDBprocedures,standalone1-gheadorbodyand10-g extremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementornumerical simulation,isnotrequiredwhenthecorrespondingSARTestExclusionThresholdcondition(s),listed below,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-gSARtestexclusion thresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f(GHz)]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, ThedevicehasbeenevaluatedtomeetgeneralRFexposurerequirement.Thedevicecanbeusedin portableexposureconditionwithoutrestriction. ForBLE Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(W)Frequency(MHz) Min. distance(mm) Calc. thresholds limit -2.828 -2.828(±1) -1.8280.65644824805 0.2068 3.0 EIRP=EMeas+20log(dMeas)-104.7 EIRPistheequivalentisotropicallyradiatedpower,indBm EMeasisthefieldstrengthoftheemissionatthemeasurementdistance,indBμV/mdMeas isthemeasurementdistance,inm NFC： Fieldstrength (dBuV/m) EIRP (dBm) Maxtune-up (mW) Frequency (MHz) Min. distance(mm) Calc. thresholds limit 57.73-37.630.0001713.5650.000003963.0 75.83-19.330.011670.12550.00002613.0 Congenital：BLE+NFC:13.56MHz+125KHz=0.068943353<1.0Limt SoaSARtestisnotrequired

PCBPrintedNFCAntennaSpecification DocumentNo. ANT-NFC-PCB-001 Version V1.0 ProductName PCBPrintedNFC Antenna Date 2026-04-28 Customer ChangchunXinhe ElectronicsCo.,Ltd. PreparedBy XiaoYuCreation Designer XiaoYuCreationAddress MayuTown,Ruian City,Wenzhou, Zhejiang,China Bandwidth 13.56MHz,125KHz MaxinmumGain 0dBi 1.Overview Thisspecificationdefinestheelectrical,mechanical,andmanufacturingrequirementsfora differentialPCB-printedNearFieldCommunication(NFC)antennawithcentertap,operatingat13.56 MHz.Theantennaisimplementedasarectangularspiralcoilona6-layerFR-4PCB,utilizingboth thetoplayerandinnerlayer1toachievetherequireddifferentialinductanceandcoupling performanceforNFCForum-compliantapplications.Thecentertapprovidesacommon-mode referencepointforbalanceddifferentialdriveandimpedancematching. 2.AntennaStructure&Dimensions Figure1.AntennaDesignDrawing Figure2.PCBRendering 2.1StructuralParameters ParameterValueUnit AntennaType RectangularSpiral(Differential) — OverallWidth23.73 mm OverallHeight 39.79 mm TraceWidth 0.50 mm TraceSpacing 0.90 mm Turns(TopLayer) 2turns Turns(InnerLayer1) 2turns FeedPoint BottomCenter(Differential Pair) — CenterTap Mid-pointofcoilwinding — 2.2PCBStack-upParameters ParameterValueUnit PCBLayers 6 — BoardThickness 1.0 mm AntennaLayersTopLayer+InnerLayer1 — TopLayerFinish SolderMaskOpening(Window) — CopperThickness(Outer) 1 oz CopperThickness(Inner) 0.5 oz 3.ElectricalPerformance Thefollowingelectricalcharacteristicsarebasedonverifiedmeasurementdata.Thetoplayerand innerlayer1areconnectedinseries.Theinductanceof1.2μHandDCresistanceof10.5mΩwere measureddirectlyacrosstheantennaterminals(differentialend-to-end)onactualPCBsamples usinganetworkanalyzer.Theantennaisdesignedfordifferentialdrivewithacentertap. ParameterTypicalTolerance Conditions OperatingFrequency 13.56±0.5MHz Resonant TotalInductance(L) 1.2 ±0.1μH Measured,@13.56 MHz ArmInductance (L_arm) 0.3 ±0.03μH Eachside,@13.56 MHz QualityFactor(Q) 20–40 — @13.56MHz DCResistance(Total) 10.5 mΩ(measured)@25°C DCResistance(Per Arm) ~5.25 mΩ(est.)@25°C ResonantCapacitance ~115 pF(typ.) Differentialmatchto L_total ArmResonant Capacitance ~460 pF(typ.) Perarm,matchto L_arm DifferentialImpedance 50–200 Ω(target) Viaexternalmatching network Note:Thetoplayerandinnerlayer1areconnectedinseries.Themeasuredend-to-endinductanceis1.2 μHandthemeasuredDCresistanceis10.5mΩ,bothmeasuredacrosstheantennaterminals.Because thecentertapislocatedatthephysicalmid-pointofthecoilwinding(halftheturns),eacharmexhibits L_arm≈L_total/4=0.3μHandR_arm≈R_total/2=5.25mΩ.Fordifferentialdriveat13.56MHz,the totalend-to-endcapacitancerequiredisapproximately115pF,whileeacharmtypicallyrequires~460pF forindividualresonance.BecausetheDCresistanceisexceptionallylow,theunloadedQ-factorwillbe veryhigh;anexternaldampingresistormayberequiredinthematchingnetworktolimitQtothe recommended20–40rangeforstableNFCcommunication. 4.MaterialSpecification ItemSpecificationRemark SubstrateMaterial FR-4 StandardTg130-140°C DielectricConstant(εr) 4.3–4.7 @1MHz LossTangent(tanδ) ≤0.025 @1MHz CopperFoil Electro-deposited(ED) — SurfaceFinishENIGorOSP Fortopantennaarea SolderMask Green(standard)Openedonantennatrace 5.Manufacturing&ProcessRequirements ThefollowingprocesscontrolsshallbeobservedduringPCBfabricationandassemblytoensure antennaperformanceconsistency. Process Requirement Tolerance Inspection TraceWidth 0.50mm±0.03mm AOI TraceSpacing 0.90mm±0.05mm AOI BoardThickness 1.0mm±0.1mm Micrometer LayerRegistration ≤0.075mm — X-ray SolderMaskOpening Exposecopperontop antenna ±0.05mmVisual/AOI ViaConnection Top↔Inner1 interconnection — X-section/E-test 6.Reliability&EnvironmentalRequirements TestItem ConditionCriterion OperatingTemperature -25°C~+85°C Noperformancedegradation StorageTemperature -40°C~+125°CNodelamination/crack HumidityResistance85°C/85%RH,168h ΔL≤±5% ThermalShock -40°C↔+85°C,100cyclesNoopen/short ESD(HBM) ±2kV Nodamage 7.Application&IntegrationNotes ThisdifferentialNFCantennawithcentertapissuitableforthefollowingapplicationscenarios: .NFCTag/ReadermoduleswithdifferentialRFfront-end(ISO/IEC14443TypeA/B) .NFCForumDeviceType1/2/3/4/5compatiblesystems .Contactlesspaymentandaccesscontrolterminals .IoTdevicesrequiring13.56MHznear-fieldcommunicationwithbalancedantennadrive IntegrationRecommendations: 1.Adifferentialmatchingnetworkisrequiredbetweentheantennafeedpoints(ANT1/ANT2)and theNFCtransceiverIC.Thecentertap(CT)shouldbeconnectedtothecommon-modevoltage reference(VMID)orRFgroundasspecifiedbythetransceiverdatasheet. 2.Forresonanceat13.56MHzwithL_total=1.2μH,therequiredtotalend-to-endcapacitanceis approximately115pF.Eacharm(L_arm≈0.3μH)willtypicallyrequire~460pFforindividualarm resonance.AccountforPCBparasiticcapacitance(typically5–15pF)whenselectingexternal matchingcapacitors. 3.ThemeasuredDCresistanceof10.5mΩisextremelylow,resultinginaveryhighunloadedQ- factor.Aseriesorparalleldampingresistor(typically1–5Ω)shouldbeincludedinthematching networktoreducetheloadedQto20–40,ensuringadequatebandwidthforNFCdatatransmission. 4.Keeptheantennaareafreefromlargecopperplanes,metalshields,orferriteplatesonthe oppositesidetoavoidQ-factordegradationandfrequencyshift. 5.Ifmetalbackingisunavoidable,placeaferritesheet(μ'≥100,thickness≥0.3mm)betweenthe PCBandthemetalsurface. 6.Top-layersoldermaskopeningisrecommendedtoreducedielectriclossesandimprovecoupling efficiency. 8.RevisionHistory VersionDate Description Author V1.02026-04-28 InitialreleaseXiaoYuCreation —EndofDocument—

-Page 1 of 24 -ReportNo.:HB20250905067E-02 Add:Room102,201,Building2,YuanwangguRFIDIndustrialPark,TongguanRoad,TianliaoCommunity,YutangStreet,GuangmingDistrict,Shenzhen,China Tel:(86-755)29989321Fax:(86-755)29985110Web:www.sz-hongbiao.com TestReport Product: chameleonultra TradeMark: N/A ModelNumber: Ultrablackdropperstyle FCCID: 2BVV3-UBDS Preparedfor CHANGCHUNXINHEDIANZIYOUXIANGONGSI Room401,Building1,AnhuaMeijun,2988SoutheastLakeAvenue,Econo micDevelopmentZone,ChangchunCity,JilinProvince,China Preparedby ShenzhenHongBiaoCertification&TestingCo.,Ltd Room102,201,Building2,YuanwangguRFIDIndustrialPark,Tongguan Road,TianliaoCommunity,YutangStreet,GuangmingDistrict,Shenzhen, China Tel.:+86-755-29989321Fax.:+86-755-29985110 Website:http://www.sz-hongbiao.com -Page 2 of 24 -ReportNo.:HB20250905067E-02 Add:Room102,201,Building2,YuanwangguRFIDIndustrialPark,TongguanRoad,TianliaoCommunity,YutangStreet,GuangmingDistrict,Shenzhen,China Tel:(86-755)29989321Fax:(86-755)29985110Web:www.sz-hongbiao.com TableofContents 1GENERALDESCRIPTION........................................................................................................................................5 1.1DESCRIPTIONOFEUT.................................................................................................................................................5 1.2TESTMODE...............................................................................................................................................................5 1.3TESTSETUP...............................................................................................................................................................5 1.4POWERSETTINGCONFIGURATIONPARAMETERS................................................................................................................6 1.5ANCILLARYEQUIPMENT...............................................................................................................................................6 2SUMMARYOFTESTRESULT..................................................................................................................................7 3TESTFACILITIESANDACCREDITATIONS................................................................................................................8 3.1TESTLABORATORY......................................................................................................................................................8 3.2ENVIRONMENTALCONDITIONS......................................................................................................................................8 3.3MEASUREMENTUNCERTAINTY......................................................................................................................................8 3.4TESTSOFTWARE.........................................................................................................................................................8 4LISTOFTESTEQUIPMENT...................................................................................................................................10 5TESTITEMANDRESULTS....................................................................................................................................12 5.1ANTENNAREQUIREMENT...........................................................................................................................................12 5.2CONDUCTEDEMISSION..............................................................................................................................................13 5.3RADIATEDEMISSION.................................................................................................................................................17 5.4OCCUPIEDBANDWIDTH.............................................................................................................................................22 6PHOTOGRAPHSOFTHETESTSETUP...................................................................................................................23 7PHOTOGRAPHSOFTHEEUT...............................................................................................................................24 -Page 3 of 24 -ReportNo.:HB20250905067E-02 Add:Room102,201,Building2,YuanwangguRFIDIndustrialPark,TongguanRoad,TianliaoCommunity,YutangStreet,GuangmingDistrict,Shenzhen,China Tel:(86-755)29989321Fax:(86-755)29985110Web:www.sz-hongbiao.com TESTRESULTCERTIFICATION Applicant’sName....................: CHANGCHUNXINHEDIANZIYOUXIANGONGSI Address ...................................... : Room401,Building1,AnhuaMeijun,2988SoutheastLake Avenue,EconomicDevelopmentZone,ChangchunCity, JilinProvince,China Manufacturer'sName ............. : CHANGCHUNXINHEDIANZIYOUXIANGONGSI Address......................................: Room401,Building1,AnhuaMeijun,2988SoutheastLake Avenue,EconomicDevelopmentZone,ChangchunCity, JilinProvince,China Productdescription Productname............................: chameleonultra ModelNumber ........................... : Ultrablackdropperstyle Standards..................................: FCCPart15C Testprocedure...........................: IEEE/ANSIC63.10-2020 ThisdevicedescribedabovehasbeentestedbyShenzhenHongBiaoCertification&TestingCo., Ltdandthetestresultsshowthattheequipmentundertest(EUT)isincompliancewiththeEMC requirements.Anditisapplicableonlytothetestedsampleidentifiedinthereport. DateofTest...............................................: Date(s)ofperformanceoftests...............: July09,2025~July23,2025 TestResult..................................................:Pass TestingEngineer: (ZoeSu) TechnicalManager: (MingLiu) Authorized Signatory : (LeoSu) -Page 4 of 24 -ReportNo.:HB20250905067E-02 Add:Room102,201,Building2,YuanwangguRFIDIndustrialPark,TongguanRoad,TianliaoCommunity,YutangStreet,GuangmingDistrict,Shenzhen,China Tel:(86-755)29989321Fax:(86-755)29985110Web:www.sz-hongbiao.com RevisionHistory RevisedNo.DateofIssu…

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