2BUDR-X91bluetooth headset

70.00mm

CoveredEquipmentAttestationLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(5)(i)-(ii)oftheCommission’sRules(47C.F.R.)weattestasfollows fortheproductlistedbelow: FCCIDModelname 2BUDR-X91X91 We, Applicant CompanyName:ShenzhenXinHengtaiIndustrialCo.,Ltd. Address:3rdFloor,RoomA1,LongshengCommercial Building,DalangStreet,Longhua District,ShenzhenCity,China Phone:N/A certifythattheequipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Thisincludesthecybersecurityandanti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofistsuccessorsandassignees. Wecertifythat,asofthedateofthefilingoftheapplication,theapplicantisnotidentifiedon theCoveredListasanentityproducing“covered”equipment. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-1-21 SignatureDate PrintedNameofSignee:HuafengQiu Company:ShenzhenXinHengtaiIndustrial Co.,Ltd. Phone:13510080002 Email:[email protected] Address:3rdFloor,RoomA1,Longsheng CommercialBuilding,DalangStreet, LonghuaDistrict,ShenzhenCity,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 2BUDR-X91X91 Fortheproductslistedabove,werequestpermanentconfidentialityforallapplicableexhibits asthereare:  theOperationalDescription  theBlockDiagram theSchematics Theabovelistedexhibitscontaintradesecretsandproprietaryinformationthatcouldbeof benefittoourcompetitors. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-1-21 SignatureDate PrintedNameofSignee/Title:HuafengQiu/Manager Company:ShenzhenXinHengtaiIndustrialCo.,Ltd. Address:3rdFloor,RoomA1,LongshengCommercial Building,DalangStreet,LonghuaDistrict,Shenzhen City,China Phone:13510080002 Fax:-- Email:[email protected]

ReportNo.:CISRR26011208701 Page 89 of 92 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR26011208701 Page 90 of 92

Label Size:10mm*4mm FCCID:2BUDR-X91 LabelLocation

ReportNo.:CISRR26011208701 Page 91 of 92 9.2.InternalPhotos ANT ReportNo.:CISRR26011208701 Page 92 of 92 ------Endofthereport-----

ReportNo.:CISRR26011208702 Reporttemplateversion:CISE-TR-001-A0Page:1of5 TESTREPORT RFExposureEvaluation ReportNo.: CISRR26011208702 ProjectNo.: CISR260112087 FCCID:2BUDR-X91 Applicant:ShenzhenXinHengtaiIndustrialCo.,Ltd. Address: 3rdFloor,RoomA1,LongshengCommercialBuilding,DalangStreet, LonghuaDistrict,ShenzhenCity Manufacturer: ShenzhenXinHengtaiIndustrialCo.,Ltd. Address: 3rdFloor,RoomA1,LongshengCommercialBuilding,DalangStreet, LonghuaDistrict,ShenzhenCity ProductName: bluetoothheadset TradeMark:- Model/Typereference:X91 ListedModel(s):- Standard:47CFRPart2.1093 Issuedate:January20,2026 Testresult:Complied Reviewedby:MorganTan Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.:CISRR26011208702 Reporttemplateversion:CISE-TR-001-A0Page:2of5 1.APPLICABLESTANDARD 47CFRPart2.1093:Radiofrequencyradiationexposureevaluation:portabledevices ANSIC95.1–3999:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 2.REPORTVERSION VersionNo.IssuedateDescription 00January20,2026Original ReportNo.:CISRR26011208702 Reporttemplateversion:CISE-TR-001-A0Page:3of5 3.RADIOSPECIFICATIONDESCRIPTION Bluetooth Supportedtype:BREDRLE-1Mbps LE-2Mbps Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThisBluetoothheadsetconsistsofaleftearpieceandarightearpiece.Theyaremirrorboardbutsame schematic.ThesedevicesuseasingletransmittermoduleandantennaforbothBT,BTcantransmit simultaneously. ReportNo.:CISRR26011208702 Reporttemplateversion:CISE-TR-001-A0Page:4of5 5.TESTRESULT 5.1.Standalonetransmission Limit: KDB447498D01v06,Clause4.3.1a) For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-g SARtestexclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]*[√f(GHz)]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation31The resultisroundedtoonedecimalplaceforcomparison Thevalues3.0and7.5arereferredtoasnumericthresholdsinstepb)below Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mm, andfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmaccordingto4.1f)isappliedtodetermine SARtestexclusion. Result: Passed TestData Radiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-up EIRP #4 (dBm) Minimum distance (mm) Evaluated value LimitResult Bluetooth- Left 2.482.351.63.954.005.000.79113.00PASS Bluetooth- Right 2.482.351.63.854.005.000.79113.00PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26011208702 Reporttemplateversion:CISE-TR-001-A0Page:5of5 5.2.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 TestData Type Evaluated value Standalone Limit RaitoValue (Evaluatedvalue/ StandaloneLimit) Sum Simultaneous Limit Result Bluetooth-Left0.791130.264 0.5271.000PASS Bluetooth-Right0.791130.264 --------EndofReport--------

Customer今尚 Project P0049 Antenna RevisionFPC Product DescriptionMonopole Product NoV1 DATE2026.01.07 Shenzhen NiYi Technology Co., Ltd P0049 Antenna data sheet 2 Purpose This report is to measure the performance of BT antenna forP0049.The antenna operating frequency at 2.4~2.5GHz, All test data are showed as below. Content 1. Product Overview & Dimension 2. Test system 3. Antenna Matching Network 4. Test Result 4.1 S11 Parameter 4.2 Test coordinate 4.3 2D Pattern 4.4 OTA Data 4.5 BT Boot measured 5. Antenna Assembly & environmental processing Shenzhen NiYi Technology Co., Ltd 3 2.Test System Sequence Number Test Itemequipment S parameterVSWR Agilent 5071C & Agilent 5062A OTA TestTRP&TISCMW500 &CMW270 ETS&SATIMO Gain & Efficiency Gain & Efficiency ETS&SATIMO Agilent 5071C Shenzhen NiYi Technology Co., Ltd Test Result OTA-BH Shenzhen NiYi Technology Co., Ltd product picture Shenzhen NiYi Technology Co., Ltd Suggest using Murata brand high-precision capacitors, resistors, and inductors，The packaging specification is 0201 Shenzhen NiYi Technology Co., Ltd S11—(BT ANT) R Shenzhen NiYi Technology Co., Ltd S11—(BT ANT)-L Shenzhen NiYi Technology Co., Ltd Frequency (MHz) Efficiency (%)Gain (dBi) 2400 35.61.1 2410 36.91.4 2420 37.31.2 2430 37.51.3 2440 37.61.4 2450 37.81.4 2460 37.81.2 2470 381.4 2480 37.81.6 2490 37.61.5 2500 37.31.3 OTA DATA-BT ANT Shenzhen NiYi Technology Co., Ltd 3D Pattern OTA DATA-BT ANT Shenzhen NiYi Technology Co., Ltd OTA DATA Test Equipment：R&S CMW500 Test Condition：3D chamber Band Wireless Protoc ol ChannelTRP(dBm)TIS(dBm) BTCLASS 1 05.3 -89.6 395.5 -88.78 784.9-88.23 BTANT-FS-L BTANT-FS-R Test Equipment：R&S CMW500 Test Condition：3D chamber Band Wireless Protoc ol ChannelTRP(dBm)TIS(dBm) BTCLASS 1 06.1 -90.3 395.72 -89.32 785.55-88.79 Shenzhen NiYi Technology Co., Ltd OTA DATA Test Equipment：R&S CMW500 Test Condition：3D chamber Band Wireless Protoc ol ChannelTRP(dBm)TIS(dBm) BTCLASS 1 02.35 -85.33 391.98 -85.12 781.77-85.33 BTANT-BH-L BTANT-BH-R Test Equipment：R&S CMW500 Test Condition：3D chamber Band Wireless Protoc ol ChannelTRP(dBm)TIS(dBm) BTCLASS 1 02.82 -85.98 392.69 -85.25 782.13-85.12 Shenzhen NiYi Technology Co., Ltd Field test placetest mode Test the mobile phone distance （M） basketball court 360° iPhone 620 Huawei P4025 Shenzhen NiYi Technology Co., Ltd Thanks for your comment! Shenzhen NiYi Technology Co., Ltd 1202B, Building C6, Hengfeng Industrial City, Xixiang, Bao'an District, Shenzhen Shenzhen NiYi Technology Co., Ltd

ReportNo.:CISRR26011208701 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of85 TESTREPORT ReportNo.CISRR26011208701 ProjectNo.CISR260112087 FCCID2BUDR-X91 ApplicantShenzhenXinHengtaiIndustrialCo.,Ltd. Address 3rdFloor,RoomA1,LongshengCommercialBuilding,DalangStreet, LonghuaDistrict,ShenzhenCity ManufacturerShenzhenXinHengtaiIndustrialCo.,Ltd. Address 3rdFloor,RoomA1,LongshengCommercialBuilding,DalangStreet, LonghuaDistrict,ShenzhenCity ProductNamebluetoothheadset Trademark- Model/TypereferenceX91 ListedModel(s)- Standard 47CFRPart15.247 DateofsamplereceiptJanuary12,2026 TestdateJanuary12,2026toJanuary15,2026 IssuedateJanuary20,2026 TestresultComplied Reviewedby:MorganTan Approvedby:HansHu ReportNo.:CISRR26011208701 Page 2 of 85 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.Supportunitusedintestconfiguration....................................................................................................7 5.4.Testsampleinformation.............................................................................................................................7 5.5.Environmentalconditions...........................................................................................................................7 5.6.Statementofthemeasurementuncertainty.............................................................................................8 5.7.EquipmentUsedduringtheTest................................................................................................................9 6.TESTRESULTS.............................................................................................................................................11 6.1.EvaluationResults(Evaluation)...............................................................................................................11 6.1.1.AntennaRequirement.............................................................................................................................11 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................12 6.2.1.ConductedEmissionatACpowerline.................................................................................................12 6.2.2.20dBBandwidth......................................................................................................................................15 6.2.3.MaximumConductedOutputPower.....................................................................................................17 6.2.4.ChannelSeparation................................................................................................................................19 6.2.5.NumberofHoppingFrequencies..........................................................................................................21 6.2.6.DwellTime...............................................................................................................................................23 6.2.7.Conductedbandedgeandspuriousemission...................................................................................25 6.2.8.Radiatedbandedgeemission...............................................................................................................27 6.2.9.RadiatedSpuriousEmission(below1GHz).........................................................................................37 6.2.10.RadiatedSpuriousEmission(Above1GHz)......................................................................................43 7.APPENDIXREPORT......................................................................................................................................57 7.1.ConductedPeakOutputPower................................................................................................................57 7.2.20dBBandwidth.........................................................................................................................................61 7.3.CarrierFrequenciesSeparation.........................................................................................…

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ReportNo.:CISRR26011208701 Page 87 of 92 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR26011208701 Page 88 of 92 RadiatedSpuriousEmission(below1GHz)