2A5YZ-D50D50 OralCam Electric Toothbrush

PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 SPECIFICATIONS Bipolarantenn CUSTOMER: aDESCRIPTION: PBX3216MA0 CUSTOMER PART No: 1 DATE OUR MODEL NO: : PLEASERETURNTOUSONECOPYOF“SPECIFICATIONFORAPPROVAL” WITHYOURAPPROVEDSIGNATURES ApprovedLiuFeiAuditLiuFeiMakingLiuXiaoMei CustomerAcknowledgesSignature Date PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 PBX3216MA01Specification OperatingTemp.:-40°C~+85°C 1.FEATURES: ●Lightweight,compact ●Widebandwidth,lowcost ●Built-inantennawithhighgain 2.APPLICATIONS: ●Bluetooth,WirelessLAN,MobileTV ●HomeRFSystem,etc 3.PRODUCTIDENTIFICATION (1)(2)(3) (1)Producttype:MultilayerchipAntenna (2)CenterFrequency:2450MHz (3)ExternalDimensions(L×W)(mm):3.2*1.6 4.SHAPEANDDIMENSIONS: LWHA 3.2 ± 0.21.6 ± 0.2 0.52±0.10.4±0.1 CH IP45 032 2 16 PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 Testplatereferencesize： Company：mm PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 Holepunchingreferencediagram APPLICATIONGUIDE 5.SPECIFICATIONS: *Testcondition:Testboardsize90*40mm Matchingcircuit:Pimatchingcircuitwillberequired PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 6.ElectricalCharacteristics: Returnloss Standingwaveratio MarkFrequencyVSWR 12400MHz1.513 22440MHz1.068 32480MHz1.464 PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 RadiationPattern TheGainpatternismeasuredinFAR-fieldchamber.DUTisplacedonthetableofrotator,a standardhornantennaandVectorNetworkAnalyzerisusedtocollectdata. ◎Efficiency Maximumgain PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 ◎3DGainPattern(2400MHz) ◎3DGainPattern(2420MHz) ◎3DGainPattern(2480MHz) PengBanXingYeShenZhenTechnologyCo.,Ltd Address：Room608,Building4,1970ScienceandTechnologyTown,MinzhiStreet,LonghuaDistrict,Shenzhen. UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ ANGLES＝ ± HOLEDIA＝ ± PengBanXingYeShenZhenTechnologyCo.,Ltd SCALE：N/AUNIT：mm THESEDRAWINGSANDSPECIFICATIONSARETHEPROPERTYOFPBXY TECHNOLOGYLimitedANDSHALLNOTBEREPRODUCEDORUSEDAS THEBASISFORTHEMANUFACTUREORSALEOFAPPARATUSOR DEVICESWITHOUTPERMISSION DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD TITLE：CHIP2450-3216Specification DOCUMENT NO. 3216 SPECREV. P1 7.EnvironmentalCharacteristics (1)ReliabilityTest (2)StorageCondition (a)Atwarehouse: Thetemperatureshouldbewithin0~30°Candhumidityshouldbelessthan60%RH. Theproductshouldbeusedwithin1yearfromthetimeofdelivery. (b)Onboard: Thetemperatureshouldbewithin-40~85°Candhumidityshouldbelessthan85%RH. (3)OperatingTemperatureRange Operatingtemperaturerange:-40°Cto+105°C. 8.RecommendedReflowSoldering PengBanXingYeSh…

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The label is located on the back of the handle.

ReportNo. : EED32S80572802Page1 of 7 RF ExposureEvaluationReport Product:D50 OralCamElectricToothbrush Trademark:usmile Model/Typereference:USM521, USM 502 , USM551 SerialNumber:N/A ReportNumber:EED32S80572802 FCC ID:2A5YZ-D50 Date of Issue:Apr. 24, 2026 Test Standards: 47 CFR Part 1.1307 47 CFR Part 1.13 10 47 CFR Part 2.1093 KDB447498D04 InterimGeneralRF ExposureGuidancev01 Test result:PASS Preparedfor: GuangzhouStars PulseCo.,Ltd. Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China Preparedby: CentreTestingInternationalGroupCo., Ltd. HongweiIndustrialPark, Zone 70, Bao ’an District, Shenzhen,Guangdong,China TEL: +86-755-33683668 FAX: +86-755-3368 3385 Compiledby:Reviewedby: Frazer.LiKevenTan Approvedby:Date:Apr. 24, 2026 AaronMa CheckNo.:9646200326 ReportNo. : EED32S80572802Page2 of 7 1 Contents Page 1 CONTENTS........................................................................................................................................................................2 2 GENERALINFORMATION..............................................................................................................................................3 2.1 CLIENTINFORMATION...................................................................................................................................................3 2.2 GENERALDESCRIPTIONOFEUT ...................................................................................................................................3 2.3 PRODUCTSPECIFICATIONSUBJECTIVETO THIS STANDARD...........................................................................................3 2.4 TESTLOCATION.............................................................................................................................................................4 2.5 DEVIATIONFROMSTANDARDS......................................................................................................................................4 2.6 ABNORMALITIESFROMSTANDARDCONDITIONS..........................................................................................................4 2.7 OTHERINFORMATIONREQUESTEDBY THECUSTOMER................................................................................................4 3 SAR EVALUATION...........................................................................................................................................................5 3.1 RF EXPOSURECOMPLIANCEREQUIREMENT.................................................................................................................5 3.1.1 Limits....................................................................................................................................................................5 3.1.2 T est Procedure....................................................................................................................................................5 3.1.3 EUT RF ExposureEvaluation..........................................................................................................................6 ReportNo. : EED32S80572802Page3 of 7 2 GeneralInformation 2.1 ClientInformation Applicant: GuangzhouStarsPulseCo.,Ltd. Addressof Applicant: Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China Manufacturer: GuangzhouStarsPulseCo.,Ltd. Addressof Manufacturer: Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China 2.2 GeneralDescriptionof EUT ProductName: D50 OralCamElectricToothbrush Model No.:USM521, USM 502 , USM551 Testmode l No.:USM551 Modeldifference: Theyhavethe sameelectrical,PCBand layout,only the modelnameand color, USM551,and USM521,USM502are differentfor marketingrequirements. TradeMark: usmile 2.3 ProductSpecificationsubjectiveto this standard FrequencyRange:BLE:2402MHz~2480MHz ModulationType:BLE:GFSK Test PowerGrade:Default Test Softwareof EUT:GRDirect_Test_Mode_Tool_Windows_V1.5.6 AntennaType: Ceramicantenna AntennaGain: 2.67 dBi PowerSupply: Battery:DC 3.6V SampleReceivedDate: Mar. 20, 2026 SampletestedDate: Mar. 20, 2026to Apr. 15, 2026 ReportNo. : EED32S80572802Page4 of 7 2.4 Test Location All testswereperformedat: CentreTestingInternationalGroupCo., Ltd HongweiIndustrialPark,Zone70, Bao'anDistrict,Shenzhen,Guangdong,China Telephone:+86 (0) 755 33683668Fax:+86(0) 755 33683385 No testsweresub-contracted. FCCDesignationNo.: CN1164,Test Firm RegistrationNo.: 260439 2.5 Deviationfrom Standards None. 2.6 Abnormalitiesfrom StandardConditions None. 2.7 OtherInformationRequestedby the Customer None. ReportNo. : EED32S80572802Page5 of 7 3 SAR Evaluation 3.1 RF ExposureComplianceRequirement 3.1.1 Limits The SAR-basedexemptionformulaof § 1.1307(b)(3)(i)(B),repeatedhereas Formula(B.2),appliesfor singlefixed,mobile,and portableRF sourceswith availablemaximumtime-averagedpoweror effective radiatedpower(ERP),whicheveris greater,of less than or equalto the thresholdPth (mW). This methodshallonly be usedat separationdistancesfrom0.5 cm to 40 cm and at frequenciesfrom 0.3 GHz to 6 GHz (inclusive).Pth is givenby Formula and f is in GHz,d is the separationdistance(cm),and ERP20cmis per Formula(B.1). The 1 mW BlanketExemptionof § 1.1307(b)(3)(i)(A)appliesfor singlefixed,mobile,and portableRF sourceswith availablemaximumtime-averagedpowerof no morethan 1 mW,regardlessof separation distance. 3.1.2 Te st Procedure Softwareprovidedby clientenabledthe EUTto transmitand receivedata at lowest,middleand highest channelindividually. ReportNo. : EED32S80572802Page6 of 7 3.1.3 EUT RF ExposureEvaluation For Standalone: Band Freq. (MHz) Estimation distance (cm) Max. Conducted Output power (dBm) Antenna Gain (dBi) ERP (dBm) ERP (mW) Limit (mW) MPE ratio Result BLE24800.55.042.675.563.602.7171.3240Pass Note： ①EIRP=conductedpower+antennagain； ②ERP=EIRP-2.15; ③EIRP(dBm)= Fieldstrengthof the fundamentalsignal(dBuV/m@3m)– 95.23; ④ERP…

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ReportNo. : EED32S80572801Page 1 of 34 Appendix: BluetoothLE ReportNo. : EED32S80572801Page 2 of 34 Contents Duty Cycle ..................................................................................................................................................................................................3 MaximumPeak ConductedOutputPower..................................................................................................................................................7 -6dB Bandwidth........................................................................................................................................................................................11 OccupiedChannelBandwidth..................................................................................................................................................................15 MaximumPowerSpectralDensityLevel ..................................................................................................................................................19 Band Edge ................................................................................................................................................................................................23 ConductedRF SpuriousEmission............................................................................................................................................................28 ReportNo. : EED32S80572801Page 3 of 34 Duty Cycle ConditionModeFrequency(MHz)AntennaDuty Cycle (%)CorrectionFactor(dB)1/T (kHz) NVNTBLE 1M2402Ant174.561.271.07 NVNTBLE 1M2440Ant174.561.271.07 NVNTBLE 1M2480Ant174.561.271.07 NVNTBLE 2M2402Ant140.083.972 NVNTBLE 2M2440Ant140.083.972 NVNTBLE 2M2480Ant140.083.972 ReportNo. : EED32S80572801Page 4 of 34 Test Graphs Duty Cycle NVNTBLE 1M 2402MHzAnt1 Duty Cycle NVNTBLE 1M 2440MHzAnt1 ReportNo. : EED32S80572801Page 5 of 34 Duty Cycle NVNTBLE 1M 2480MHzAnt1 Duty Cycle NVNTBLE 2M 2402MHzAnt1 ReportNo. : EED32S80572801Page 6 of 34 Duty Cycle NVNTBLE 2M 2440MHzAnt1 Duty Cycle NVNTBLE 2M 2480MHzAnt1 ReportNo. : EED32S80572801Page 7 of 34 MaximumPeak ConductedOutputPower ConditionModeFrequency (MHz) AntennaConductedPower (dBm) Limit (dBm) Verdict NVNTBLE 1M2402Ant15.0130Pass NVNTBLE 1M2440Ant15.0430Pass NVNTBLE 1M2480Ant14.9930Pass NVNTBLE 2M2402Ant15.0130Pass NVNTBLE 2M2440Ant15.0430Pass NVNTBLE 2M2480Ant14.9730Pass ReportNo. : EED32S80572801Page 8 of 34 Test Graphs Peak PowerNVNTBLE 1M 2402MHzAnt1 Peak PowerNVNTBLE 1M 2440MHzAnt1 ReportNo. : EED32S80572801Page 9 of 34 Peak PowerNVNTBLE 1M 2480MHzAnt1 Peak PowerNVNTBLE 2M 2402MHzAnt1 ReportNo. : EED32S80572801Page 10 of 34 Peak PowerNVNTBLE 2M 2440MHzAnt1 Peak PowerNVNTBLE 2M 2480MHzAnt1 ReportNo. : EED32S80572801Page 11 of 34 -6dB Bandwidth ConditionModeFrequency(MHz)Antenna-6 dB Bandwidth(MHz)Limit -6 dB Bandwidth(MHz)Verdict NVNTBLE 1M2402Ant10.7160.5Pass NVNTBLE 1M2440Ant10.7020.5Pass NVNTBLE 1M2480Ant10.7080.5Pass NVNTBLE 2M2402Ant11.0470.5Pass NVNTBLE 2M2440Ant11.0490.5Pass NVNTBLE 2M2480Ant11.0520.5Pass ReportNo. : EED32S80572801Page 12 of 34 Test Graphs -6dB BandwidthNVNTBLE 1M 2402MHzAnt1 -6dB BandwidthNVNTBLE 1M 2440MHzAnt1

ReportNo. : EED32S80572801Page 13 of 34 -6dB BandwidthNVNTBLE 1M 2480MHzAnt1 -6dB BandwidthNVNTBLE 2M 2402MHzAnt1 ReportNo. : EED32S80572801Page 14 of 34 -6dB BandwidthNVNTBLE 2M 2440MHzAnt1 -6dB BandwidthNVNTBLE 2M 2480MHzAnt1 ReportNo. : EED32S80572801Page 15 of 34 OccupiedChannelBandwidth ConditionModeFrequency(MHz)Antenna99% OBW (MHz) NVNTBLE 1M2402Ant11.021 NVNTBLE 1M2440Ant11.012 NVNTBLE 1M2480Ant11.031 NVNTBLE 2M2402Ant12.077 NVNTBLE 2M2440Ant12.038 NVNTBLE 2M2480Ant12.015 ReportNo. : EED32S80572801Page 16 of 34 Test Graphs OBW NVNTBLE 1M 2402MHzAnt1 OBW NVNTBLE 1M 2440MHzAnt1 ReportNo. : EED32S80572801Page 17 of 34 OBW NVNTBLE 1M 2480MHzAnt1 OBW NVNTBLE 2M 2402MHzAnt1 ReportNo. : EED32S80572801Page 18 of 34 OBW NVNTBLE 2M 2440MHzAnt1 OBW NVNTBLE 2M 2480MHzAnt1 ReportNo. : EED32S80572801Page 19 of 34 MaximumPowerSpectralDensityLevel ConditionModeFrequency (MHz) AntennaConductedPSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNTBLE 1M2402Ant1-7.238Pass NVNTBLE 1M2440Ant1-7.348Pass NVNTBLE 1M2480Ant1-7.348Pass NVNTBLE 2M2402Ant1-7.058Pass NVNTBLE 2M2440Ant1-6.578Pass NVNTBLE 2M2480Ant1-9.58Pass ReportNo. : EED32S80572801Page 20 of 34 Test Graphs PSD NVNTBLE 1M 2402MHzAnt1 PSD NVNTBLE 1M 2440MHzAnt1 ReportNo. : EED32S80572801Page 21 of 34 PSD NVNTBLE 1M 2480MHzAnt1 PSD NVNTBLE 2M 2402MHzAnt1 ReportNo. : EED32S80572801Page 22 of 34 PSD NVNTBLE 2M 2440MHzAnt1 PSD NVNTBLE 2M 2480MHzAnt1 ReportNo. : EED32S80572801Page 23 of 34 Band Edge ConditionModeFrequency(MHz)AntennaMax Value (dBc)Limit (dBc)Verdict NVNTBLE 1M2402Ant1-38.72-20Pass NVNTBLE 1M2480Ant1-44.35-20Pass NVNTBLE 2M2402Ant1-35.78-20Pass NVNTBLE 2M2480Ant1-42.18-20Pass

ReportNo. : EED32S80572801Page 24 of 34 Test Graphs Band Edge NVNTBLE 1M 2402MHzAnt1 Ref Band Edge NVNTBLE 1M 2402MHzAnt1 Emission ReportNo. : EED32S80572801Page 25 of 34 Band Edge NVNTBLE 1M 2480MHzAnt1 Ref Band Edge NVNTBLE 1M 2480MHzAnt1 Emission ReportNo. : EED32S80572801Page 26 of 34 Band Edge NVNTBLE 2M 2402MHzAnt1 Ref Band Edge NVNTBLE 2M 2402MHzAnt1 Emission ReportNo. : EED32S80572801Page 27 of 34 Band Edge NVNTBLE 2M 2480MHzAnt1 Ref Band Edge NVNTBLE 2M 2480MHzAnt1 Emission ReportNo. : EED32S80572801Page 28 of 34 ConductedRF SpuriousEmission ConditionModeFrequency(MHz)AntennaMax Value (dBc)Limit (dBc)Verdict NVNTBLE 1M2402Ant1-49.11-20Pass NVNTBLE 1M2440Ant1-41.8-20Pass NVNTBLE 1M2480Ant1-48.98-20Pass NVNTBLE 2M2402Ant1-50.36-20Pass NVNTBLE 2M2440Ant1-41.98-20Pass NVNTBLE 2M2480Ant1-46.16-20Pass ReportNo. : EED32S80572801Page 29 of 34 Test Graphs Tx. SpuriousNVNTBLE 1M 2402MHzAnt1 Ref Tx. SpuriousNVNTBLE 1M 2402MHzAnt1 Emission ReportNo. : EED32S80572801Page 30 of 34 Tx. SpuriousNVNTBLE 1M 2440MHzAnt1 Ref Tx. SpuriousNVNTBLE 1M 2440MHzAnt1 Emission ReportNo. : EED32S80572801Page 31 of 34 Tx. SpuriousNVNTBLE 1M 2480MHzAnt1 Ref Tx. SpuriousNVNTBLE 1M 2480MHzAnt1 Emission ReportNo. : EED32S80572801Page 32 of 34 Tx. SpuriousNVNTBLE 2M 2402MHzAnt1 Ref Tx. SpuriousNVNTBLE 2M 2402MHzAnt1 Emission ReportNo. : EED32S80572801Page 33 of 34 Tx. SpuriousNVNTBLE 2M 2440MHzAnt1 Ref Tx. SpuriousNVNTBLE 2M 2440MHzAnt1 Emission

ReportNo. : EED32S80572801Page 34 of 34 Tx. SpuriousNVNTBLE 2M 2480MHzAnt1 Ref Tx. SpuriousNVNTBLE 2M 2480MHzAnt1 Emission *** End of Report***

ReportNo. : EED32S80572801Page 1 of 58 TESTREPORT Product:D50 OralCamElectricToothbrush Trademark:usmile Model/Typereference:USM521, USM 502 , USM551 SerialNumber:N/A ReportNumber:EED32S80572801 FCC ID:2A5YZ-D50 Dateof Issue:Apr. 24, 2026 TestStandards:47 CFR Part 15 SubpartC Testresult:PASS Preparedfor: GuangzhouStarsPulseCo.,Ltd. Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China Preparedby: CentreTestingInternationalGroupCo., Ltd. HongweiIndustrialPark,Zone70 , Bao ’an District, Shenzhen,Guangdong,China TEL:+86-755-33683668 FAX:+86-755-33683385 Compiledby:Reviewedby: Frazer.LiKevenTan Approvedby:Date:Apr. 24, 2026 AaronMa CheckNo.:9646200326 ReportNo. : EED32S80572801Page 2 of 58 1 Content 1 CONTENT............................................................................................................................................................................2 2 TESTSUMMARY...............................................................................................................................................................3 3 GENERALINFORMATION...............................................................................................................................................4 3.1 CLIENTINFORMATION....................................................................................................................................................4 3.2 GENERALDESCRIPTIONOFEUT.................................................................................................................................4 3.3 TESTCONFIGURATION..................................................................................................................................................5 3.4 TESTENVIRONMENT.....................................................................................................................................................6 3.5 DESCRIPTIONOFSUPPORTUNITS...............................................................................................................................6 3.6 TESTLOCATION.............................................................................................................................................................6 3.7 MEASUREMENTUNCERTAINTY(95%CONFIDENCELEVELS,K=2).............................................................................6 4 EQUIPMENTLIST..............................................................................................................................................................7 5 TESTRESULTSANDMEASUREMENTDATA.........................................................................................................10 5.1 ANTENNAREQUIREMENT............................................................................................................................................10 5.2 CONDUCTEDEMISSIONS.............................................................................................................................................11 5.3 MAXIMUMCONDUCTEDOUTPUTPOWER..................................................................................................................15 5.4 DTS BANDWIDTH........................................................................................................................................................16 5.5 MAXIMUMPOWERSPECTRALDENSITY.....................................................................................................................17 5.6 BANDEDGEMEASUREMENTSANDCONDUCTEDSPURIOUSEMISSION...................................................................18 5.7 RADIATEDSPURIOUSEMISSION& RESTRICTEDBANDS...........................................................................................19 6 APPENDIXA.....................................................................................................................................................................56 7 PHOTOGRAPHS..............................................................................................................................................................57 ReportNo. : EED32S80572801Page 3 of 58 2 TestSummary TestItemTestRequirementResult AntennaRequirement 47 CFRPart 15 SubpartC Section 15.203/15.247(c) PASS AC PowerLineConducted Emission 47 CFRPart 15 SubpartC Section 15.207 PASS DTS Bandwidth 47 CFRPart 15 SubpartC Section 15.247(a)(2) PASS MaximumConductedOutput Power 47 CFRPart 15 SubpartC Section 15.247(b)(3) PASS MaximumPowerSpectral Density 47 CFRPart 15 SubpartC Section15.247(e)PASS BandEdgeMeasurements 47 CFRPart 15 SubpartC Section 15.247(d) PASS ConductedSpuriousEmissions 47 CFRPart 15 SubpartC Section 15.247(d) PASS RadiatedSpuriousEmission& Restrictedbands 47 CFRPart 15 SubpartC Section 15.205/15.209 PASS ReportNo. : EED32S80572801Page 4 of 58 3 GeneralInformation 3.1 ClientInformation Applicant:GuangzhouStarsPulseCo.,Ltd. Addressof Applicant:Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China Manufacturer:GuangzhouStarsPulseCo.,Ltd. Addressof Manufacturer:Room2001,2002,2003,2004,2005,No.239TianheNorthRoad,Tianhe District,GuangzhouCity,GuangdongProvince,China 3.2 GeneralDescriptionof EUT ProductName: D50 OralCamElectricToothbrush Model No.:USM521, USM 502 , USM551 Testmode l No.:USM551 Modeldifference: Theyhavethe sameelectrical,PCBand layout,only the modelnameand color,USM551,and USM521,USM502are differentfor marketing requirements. Trade mark: usmile ProductType: MobilePortableFix Location OperationFrequency: 2402MHz~2480MHz ModulationType: GFSK TransferRate:1Mbps, 2Mbps Numberof Channel: 40 AntennaType :Ceramicantenna AntennaGain:2.67 dBi PowerSupply: Battery:DC 3.6V Test Voltage:DC 3.6 V SampleReceivedDate:Mar. 20, 2026 SampletestedDate:Mar. 20, 2026to Apr. 15, 2026 ReportNo. : EED32S80572801Page 5 of 58 OperationFrequencyeachof channel Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Chann…

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ReportNo. : EED32S80572801Page 45 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 11415.894412.8836.7449.6274.0024.38PASSVerticalPK 22201.280115.4336.4651.8974.0022.11PASSVerticalPK 34987.1325-8.1153.1044.9974.0029.01PASSVerticalPK 47440.296-2.5062.7660.2674.0013.74PASSVerticalPK 512402.62683.8556.1560.0074.0014.00PASSVerticalPK 617363.957613.9945.7559.7474.0014.26PASSVerticalPK 77442.2962-2.4652.8450.3854.003.62PASSVerticalAV 812401.62683.8547.0150.8654.003.14PASSVerticalAV 917360.957414.0334.6148.6454.005.36PASSVerticalAV ReportNo. : EED32S80572801Page 46 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 119035.3414-26.2362.6436.4174.0037.59PASS Horizon tal PK 220011.1804-24.6761.7137.0474.0036.96PASS Horizon tal PK 320970.3588-25.9561.9636.0174.0037.99PASS Horizon tal PK 422315.7926-25.2366.7941.5674.0032.44PASS Horizon tal PK 523899.576-22.1459.5237.3874.0036.62PASS Horizon tal PK 624854.3342-22.0158.7836.7774.0037.23PASS Horizon tal PK ReportNo. : EED32S80572801Page 47 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 118947.2779-26.2862.6536.3774.0037.63PASSVerticalPK 220112.1645-25.1261.8436.7274.0037.28PASSVerticalPK 321237.6095-25.7761.6235.8574.0038.15PASSVerticalPK 422316.1326-25.2361.4136.1874.0037.82PASSVerticalPK 523873.3949-22.1959.1536.9674.0037.04PASSVerticalPK 624865.5546-22.0257.6635.6474.0038.36PASSVerticalPK Remark: 1) The field strengthis calculatedby addingthe AntennaFactor,CableFactor& Preamplifier.The basic equationwith a samplecalculationis as follows: FinalTest Level=ReceiverReading+ AntennaFactor+ CableFactor– PreamplifierFactor 2) Scanfrom 9kHzto 25GHz,the disturbanceabove10GHz and below30MHzwas very low . As shownin this section,for frequenciesabove1GHz,the field strengthlimitsare basedon averagelimits.However,the peakfield strengthof any emissionshallnot exceedthe maximumpermittedaveragelimitsspecifiedabove by morethan 20 dB underany conditionof modulation.As the PK valuesare all below54 dB μV/m . So, only the peakmeasurementswereshownin the report. ReportNo. : EED32S80572801Page 48 of 58 Restrictedbands: Testplot as follows: Test_Mode BLE 1M GFSK Transmitting Test_Frequency2402MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 1239015.9645.9261.8874.0012.12PASS Horizon tal PK 2239015.9630.3846.3454.007.66PASS Horizon tal AV ReportNo. : EED32S80572801Page 49 of 58 Test_Mode BLE 1M GFSK Transmitting Test_Frequency2402MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 1239015.9640.4756.4374.0017.57PASSVerticalPK 2239015.9628.0844.0454.009.96PASSVerticalAV ReportNo. : EED32S80572801Page 50 of 58 Test_Mode BLE 1M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 12483.516.2950.1766.4674.007.54PASS Horizon tal PK 22483.516.2935.4451.7354.002.27PASS Horizon tal AV ReportNo. : EED32S80572801Page 51 of 58 Test_Mode BLE 1M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 12483.516.2941.6857.9774.0016.03PASSVerticalPK 22483.516.2928.9445.2354.008.77PASSVerticalAV ReportNo. : EED32S80572801Page 52 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2402MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 1239015.9643.8959.8574.0014.15PASS Horizon tal PK 2239015.9630.8846.8454.007.16PASS Horizon tal AV ReportNo. : EED32S80572801Page 53 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2402MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 1239015.9638.3154.2774.0019.73PASSVerticalPK 2239015.9627.3143.2754.0010.73PASSVerticalAV ReportNo. : EED32S80572801Page 54 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 12483.516.2948.7965.0874.008.92PASS Horizon tal PK 22483.516.2933.8450.1354.003.87PASS Horizon tal AV ReportNo. : EED32S80572801Page 55 of 58 Test_Mode BLE 2M GFSK Transmitting Test_Frequency2480MHz Remark:/Test_Date2026/4/15 TestGraph SuspectedList NO Freq. [MHz] Factor [dB] Reading [dB μV] Level [dB μV/m] Limit [dB μV/m] Margin [dB] ResultPolarityRemark 12483.516.2943.6959.9874.0014.02PASSVerticalPK 22483.516.2929.5545.8454.008.16PASSVerticalAV Note: The field strengthis calculatedby addingthe AntennaFactor,CableFactor& Preamplifier.The basic equationwith a samplecal…

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