2BXDH-HX-3Space heater

LocalRepresentativeLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(7),oftheCommission’sRules(47C.F.R.)weattestasfollowsfor theproductlistedbelow: FCCIDModelname 2BXDH-HX-3HX-3 Weherebyacknowledgeasfollows: i.bothsigneesconfirmthatthepointofcontactacceptsresponsibilitytoactasaUS- AmericanRepresentativeonbehalfoftheapplicant ii.thepointofcontactprovidesthephysicalU.S.addressandemailaslistedbelow iii.bothpartiesmaintaintherequirementsofthisagreementwithoutexpirationdate US-AmericanPointofContactApplicant/ApprovalHolder SignatureSignature CompanyName:GLOCERTSTECHNOLOGYINCShanghaiTiannuoyaElectrical TechnologyCo.,Ltd FRN:00363397370038706057 ContactName:HuiyingFanJieXiao Address:19784SUNKISSEDRIDGEDR, RIVERSIDE,CA92507 Room1112,Building1,No.339, Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China Phone:(626)588-8039-- Email:[email protected]@cis-cn.net

CoveredEquipmentAttestationLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(5)(i)-(ii)oftheCommission’sRules(47C.F.R.)weattestas followsfortheproductlistedbelow: FCCIDModelname 2BXDH-HX-3HX-3 We, Applicant CompanyName:ShanghaiTiannuoyaElectricalTechnology Co.,Ltd Address:Room1112,Building1,No.339,Lane1035, QilianshanRoad,PutuoDistrict,Shanghai, China Phone:N/A certifythattheequipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Thisincludesthecybersecurityandanti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofistsuccessorsandassignees. Wecertifythat,asofthedateofthefilingoftheapplication,theapplicantisnotidentified ontheCoveredListasanentityproducing“covered”equipment. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-8-11 SignatureDate PrintedNameofSignee:JieXiao Company:ShanghaiTiannuoyaElectrical TechnologyCo.,Ltd Phone:-- Email:[email protected] Address:Room1112,Building1,No.339, Lane1035,QilianshanRoad,PutuoDistrict, Shanghai,China Fax:N/A

ConfidentialityRequestLetter ForCertificationServiceintheUSA FederalCommunicationCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoParagraphs§0.457and0.459oftheCommission’sRules(47C.F.R.)andSection §552(b)(4)oftheFreedomofInformationAct,werequestconfidentialityforthe documentationofthefollowingproducts: FCCIDModelname 2BXDH-HX-3HX-3 Fortheproductslistedabove,werequestpermanentconfidentialityforallapplicable exhibitsasthereare:  theOperationalDescription  theBlockDiagram theSchematics Theabovelistedexhibitscontaintradesecretsandproprietaryinformationthatcouldbeof benefittoourcompetitors. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-8-11 SignatureDate PrintedNameofSignee/Title:JieXiao/Manager Company:ShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address:Room1112,Building1,No.339,Lane1035,Qilianshan Road,PutuoDistrict,Shanghai,China Phone:-- Fax:-- Email:[email protected]

ReportNo.:CISRR26072150001 Page 49 of 52 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR26072150001 Page 50 of 52

Label Size:20mm*16mm Productname:Spaceheater ModelName:HX-3 FCCID:2BXDH-HX-3 LabelLocation

ReportNo.:CISRR26072150001 Page 51 of 52 9.2.InternalPhotos ReportNo.:CISRR26072150001 Page 52 of 52 ------Endofthereport----- ANT

ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:1of6 TESTREPORT RFExposureEvaluation ReportNo.CISRR26072150003 ProjectNo.CISR260721500 FCCID2BXDH-HX-3 ApplicantShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ManufacturerShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ProductNameSpaceheater Trademark- Model/TypereferenceHX-3 ListedModel(s)- Standard 47CFRPart2.1091 DateofsamplereceiptJuly21,2026 TestdateJuly23,2026toJuly30,2026 IssuedateJuly31,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:2of6 1.APPLICABLESTANDARD 47CFRPart2.1091:Radiofrequencyradiationexposureevaluation:mobiledevices ANSIC95.1–2019:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 47CFRPart1.1310:Radiofrequencyradiationexposurelimits. 2.REPORTVERSION VersionNo.IssuedateDescription 00July31,2026Original ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:3of6 3.RADIOSPECIFICATIONDESCRIPTION Bluetooth Supportedtype:BREDRLE-1Mbps LE-2Mbps WIFI-2.4GHzBand Supportedtype:802.11b802.11g802.11n 802.11ax Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThedeviceuseonetransmittermoduleandantennaforbothWLANandBluetooth,cannotsimultaneous transmission. ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:4of6 5.TESTRESULT 5.1.SARtestexclusionEvaluation ExclusionLimit: KDB447498D01v06,Clause4.3.1b) 100MHzto1500MHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·(f(MHz)/150)]}mW 1500MHzand≤6GHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·10]}mW Result: Passed TestData Radiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-upEIRP (dBm) Minimum distance #4 (mm) Exclusion Limit (dBm) Result 2.4GWIFI2.46212.081.1613.2414.00200mm32.03PASS BLE2.4800.531.161.692.00200mm32.03PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:5of6 5.2.Standalonetransmission Limit: Thecriterialistedinthefollowingtableshallbeusedtoevaluatetheenvironment impactofhumanexposuretoradiofrequency(RF)radiationasspecifiedin1.1307(b) LimitsforMaximumPermissibleExposure(MPE) Frequency range(MHz) Electricfield strength(V/m) Magneticfield strength (A/m) Powerdensity (mW/cm 2 ) Averaging time(minutes) (A)LimitsforOccupational/ControlledExposures 0.3–3.06141.63*(100)6 3.0–301842/f4.89/f *(900/f 2 ) 6 30–30061.40.1631.06 300–1500--f/3006 1500–100,000--56 (B)LimitsforGeneralPopulation/UncontrolledExposure 0.3–1.346141.63*(100)30 1.34–30824/f2.19/f *(180/f 2 ) 30 30–30027.50.0730.230 300–1500--f/150030 1500–100,000--1.030 Evaluationmethod: Pd=(Pout*G)/(4*pi*r 2 ) Where Pd=powerdensityinmW/cm 2 ,Pout=outputpowertoantennainmW, G=gainofantennainlinearscale,Pi=3.1416, R=distancebetweenobservationpointandcenteroftheradiatorincm Result:Passed TestData Radiotype Maximum outputpower (dBm) #1 Maximum tune-uppower (dBm) Antenna gain(dBi) #2 Minimun distance(cm) #3 Pd (mW/cm 2 ) Limit (mW/cm 2 ) Result 2.4GWIFI12.08131.16200.00521.0PASS BLE0.5311.16200.00031.0PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26072150003 Reporttemplateversion:CISE-TR-001-A0Page:6of6 5.3.Simultaneoustransmission Limit: KDB447498D01v06,Clause4.3.2,47CFRPart1.1307 InthecaseofxedRFsourcesoperatinginthesametime-averagingperiod,orof multiplemobileorportableRFsourceswithinadeviceoperatinginthesametime averagingperiod,ifthesumofthefractionalcontributionstotheapplicablethresholds islessthanorequalto1asindicatedinthefollowingequation. Where a=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(B)ofthissectionforP,includingexistingexempttransmittersandthosebeing added. b=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(C)ofthissectionforThresholdERP,includingexistingexempttransmittersand thosebeingadded. c=numberofexistingfixed,mobile,orportableRFsourceswithknownevaluationforthespeci edminimumdistanceincludingexistingevaluatedtransmitters. P j =theavailablemaximumtime-averagedpowerortheERP,whicheverisgreater,forxed, mobile,orportableRFsourceiatadistancebetween0.5cmand40cm(inclusive). P th,j =theexemptionthresholdpower(P)accordingtoparagraph(b)(3)(i)(B)ofthissectionfor xed,mobile,orportableRFsourcei. ERP j =theERPoffixed,mobile,orportableRFsourcej. ERP th,j =exemptionthresholdERPforfixed,mobile,orportableRFsourcej,atadistanceofat leastλ/2πaccordingtotheapplicableformulaofparagraph(b)(3)(i)(C)ofthissection. Evaluated k =themaximumreportedSARorMPEoffixed,mobile,orportableRFsourcekeither inthedeviceoratthetransmittersitefromanexistingevaluationatthelocationofexposure. ExposureLimit k =eitherthegeneralpopulation/uncontrolledmaximumpermissibleexposure (MPE)orspecicabsorptionrate(SAR)limitforeachxed,mobile,orportableRFsourcek, asapplicablefrom§1.1310ofthischapter. Result:NotApplicable --------EndofReport--------

ReportNo.:CISRR26072150001 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of45 TESTREPORT ReportNo.CISRR26072150001 ProjectNo.CISR260721500 FCCID2BXDH-HX-3 ApplicantShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ManufacturerShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ProductNameSpaceheater Trademark- Model/TypereferenceHX-3 ListedModel(s)- Standard 47CFRPart15.247 DateofsamplereceiptJuly21,2026 TestdateJuly23,2026toJuly30,2026 IssuedateJuly31,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu ReportNo.:CISRR26072150001 Page 2 of 45 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................6 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformation.............................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.6dBBandwidth........................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................16 6.2.4.PowerSpectralDensity..........................................................................................................................17 6.2.5.Conductedbandedgeandspuriousemission...................................................................................18 6.2.6.Radiatedbandedgeemission...............................................................................................................19 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................25 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................28 7.APPENDIXREPORT......................................................................................................................................35 7.1.MaximumConductedOutputPower........................................................................................................35 7.2.PowerSpectralDensity.............................................................................................................................37 7.3.6dBBandwidth...........................................................................................................................................39 7.4.Conductedbandedge&spuriousemission..........................................................................................41 ReportNo.:CISRR26072150001 Page 3 of 45 1.STANDARDANDAPPLICABLETESTMETHODS Thetestswereperformedaccordingtofollowingstandards: 47CFRPart15.247:Operationwithinthebands902-928MHz,2400-2483.5MHz,and5725-5850MHz ANSIC63.10-2020:AmericanNationalStandardofProceduresforComplianceTestingofUnlicensed Wirel…

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ReportNo.:CISRR26072150002 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of62 TESTREPORT ReportNo.CISRR26072150002 ProjectNo.CISR260721500 FCCID2BXDH-HX-3 ApplicantShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ManufacturerShanghaiTiannuoyaElectricalTechnologyCo.,Ltd Address Room1112,Building1,No.339,Lane1035,QilianshanRoad, PutuoDistrict,Shanghai,China ProductNameSpaceheater Trademark- Model/TypereferenceHX-3 ListedModel(s)- Standard 47CFRPart15.247 DateofsamplereceiptJuly21,2026 TestdateJuly23,2026toJuly30,2026 IssuedateJuly31,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu ReportNo.:CISRR26072150002 Page 2 of 62 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................5 4.4.Deviationfromstandards...........................................................................................................................5 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformation.............................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.6dBBandwidth........................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................16 6.2.4.PowerSpectralDensity..........................................................................................................................17 6.2.5.Conductedbandedgeandspuriousemission...................................................................................18 6.2.6.Radiatedbandedgeemission...............................................................................................................19 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................24 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................27 7.APPENDIXREPORT......................................................................................................................................34 7.1.MaximumConductedOutputPower........................................................................................................34 7.2.PowerSpectralDensity.............................................................................................................................39 7.3.6dBBandwidth...........................................................................................................................................44 7.4.Conductedbandedge&spuriousemission..........................................................................................49 ReportNo.:CISRR26072150002 Page 3 of 62 1.STANDARDANDAPPLICABLETESTMETHODS Thetestswereperformedaccordingtofollowingstandards: 47CFRPart15.247:Operationwithinthebands902-928MHz,2400-2483.5MHz,and5725-5850MHz ANSIC63.10-2020:AmericanNationalStandardofProceduresforComplianceTestingofUnlicensed Wirel…

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AntennaSpecification Manufacture：TUYA Product Name：WBRU Antenna Antenna Type：PCB Test Date：2020.01.15 Tested by：Long Wang Approved by：Licco Content 1.GeneralDescription.................................................................................1 2.TestConfigurations...................................................................................2 2.1TestEnvironment............................................................................2 2.2TestEquipment...............................................................................2 2.3TestPrinciple...................................................................................2 3.TestResults..............................................................................................3 3.1GainandEfficiency..........................................................................3 3.2RadiationPattern............................................................................4 4.AntennaDimensions................................................................................6 5.EUTPhoto................................................................................................6 6.TestSetupPhoto......................................................................................7 1 1.GeneralDescription ManufacturerHangzhouTuyaInformationTechnologyCo.,Ltd Address Room701,Building3,MoreCenter,No.87GuDunRoad, Hangzhou,Zhejiang,China TestLocation Room106,Building3,LetongSciencePark,No.500, QiuyiRoad,BinjiangDistrict,Hangzhou ProductNameWBRUAntenna Productmodel WBRU AntennaType PCBAntenna TestItems Gain;Efficiency;RadiationPattern TestFrequency 2400-2500MHz TestStandard ANSI/IEEEStd149-1979 2 2.TestConfigurations 2.1TestEnvironment Temperature(°C)25 Humidity(%RH)60 AtmosphericPressure(kPa)100.5 2.2TestEquipment TestSystemTEM24Multi-probeMicrowaveChamber TestInstrumentAgilentE5071B 2.3TestPrinciple 3 3.TestResults 3.1GainandEfficiency Frequency(MHz)PeakGain(dBi)Efficiency(%) 240052.2 1.16 9 241052.10.987 242053.1 1.16 4 243054.10.576 244057.60.242 245059.6-1.174 246061.5-1.175 247060.6-1.384 248062.8-1.546 249059.8-1.745 250060.4-2.491 4 3.2RadiationPattern Phi02D Phi902D 4.AntennaDimension 5 s 5.EUTPhoto 6.TestSetupPhot 6 o

ReportNo.:CISRR26072150001 Page 47 of 52 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR26072150001 Page 48 of 52 RadiatedSpuriousEmission(below1GHz)