2A5PJ-EH925ULTRADHeadset

DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Dec.8,25 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:2A5PJ-EH925ULTRAD ProductName:Headset Thisletterservesasanattestationthattheequipmentidentifiedaboveisnot(selectone)"covered"software asdefinedundertheFederalCommunicationsCommission(FCC)CoveredListrequirements,asoutlined inFCC22-84andKDB986446. Specifically,theundersignedcertifiesthattheequipmentforwhichauthorizationissought: 1.Doesnotcontaincybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab, Inc.oranyofitssuccessors,assignees,parents,subsidiaries,affiliates,oranyentitythathasrebranded orrelabeledsoftwareproducedbytheaforementionedentities. 2.Doesnothavethecapabilitytostore,run,ordeliveranysoftwareidentifiedontheFCCCoveredList, includingbutnotlimitedtocybersecurityandanti-virussoftware. Tosupportthisattestation,theappendixevaluationdocumentationhasbeenpreparedandisincludedinthe certificationfiling. Thisattestationisbasedonathoroughevaluationofthedevice'sdesign,functionality,andsoftware environment.Theundersignedaffirmsthattheinformationprovidedisaccurateandcompletetothebestof theirknowledge. Sincerelyyours, PrintedName:BoJiang Title:R&DManager Address:No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China Tel.:+86076986308806 Email:[email protected] DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China 2|Page EvaluationregardingtotheCoveredListSoftware: Compliance Methodology EvaluationProcessResults Deviceis Inherent compliance ☒ TheChipset(s)usedislimitedtorun theCybersecurityoranti-virus software. Compliance ☒ TheMemoryusedislimitedtorunthe Cybersecurityoranti-virussoftware. Compliance ☒ Thereisstoragecapacitylimitationfor storeorinstalltheCybersecurityor anti-virussoftware. Compliance ☒ Operatingsystemusedislimitedto run,installordelivertheCybersecurity oranti-virussoftware. Compliance Deviceisnot Inherent compliance ☐ EvaluationBasedonSoftware BillofMaterials(SBoM) Seeattached“SBoM“ Note:TheSBoMcontentislimited tothescopeofcoveredlist software(e.g.antivirusand cybersecuritysoftware). ☐ EvaluationBasedonScanfor Softwareonthedevice ☐ EvaluationBasedonFilesystemscan ☐ EvaluationBasedonRunning softwarecheck

DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:12/8/2025 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID:2A5PJ-EH925ULTRAD DongguanDareuElectronicsAudioCo.,LTDcertifiesthat,asofthedateofthefilingoftheapplication, theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§1.50002ofreference chapter,asanentityproducing“covered”communicationequipment.Theequipmentforwhich authorizationissoughtisnot“covered”telecommunicationsequipmentandvideosurveillance equipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibitedfrom receivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, PrintedName:BoJiang Title:R&DManager Address:No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China Tel.:+86076986308806 Email:[email protected]

DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China 12/8/2025 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:ConfidentialityRequestfor:FCCID:2A5PJ-EH925ULTRAD PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestpermanent confidentialtreatmentoftheexhibitsaccompanyingthiscertificationapplicationasoutlinedbelow:  BlockDiagram Schematics  OperationalDescription Theaboveexhibitscontaintradesecretsand/orproprietaryinformationthatarenotpubliclyavailableand materialsthattheApplicanthasspentconsiderableeffortsindeveloping.Publicdisclosureofthesemay beharmfultotheApplicantandgiveanunfairadvantagetocompetitorsonthemarket. PursuanttoDA04-1705,theapplicantalsorequeststemporaryconfidentialtreatmentoftheexhibits outlinedbelowforaperiodof(upto180)daysfromthedateofequipmentauthorizationandpriorto marketingintheUnitedStatestopreventtheprematurereleaseofanysensitiveinformation.Applicantis awareoftheirresponsibilitytonotifyDERYCOMintheeventinformationregardingtheproductorthe productismadeavailabletothepublicbeforetherequestedperiodhasexpired. UserManual  InternalPhotos ExternalPhotos  TestSetupPhotos Sincerely, Title:R&DManager Address:No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China Tel.:+86076986308806 Email:[email protected]

DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,GuangdongProvince.China 2025/12/2 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:AgentAuthorizationforFCCID:2A5PJ-EH925ULTRAD I,theundersigned,herebyauthorize(ShenzhenAnbotekComplianceLaboratoryLimited.)toactonour behalfinallmattersrelatingtothisapplicationforequipmentcertification. Anyactcarriedoutby(ShenzhenAnbotekComplianceLaboratoryLimited.)shallhavethesameeffectas ourownandIacknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsof certification,asspecifiedbyDERYCOMCERTIFICATIONSERVICES,INC.,stillresideswith(Dongguan DareuElectronicsAudioCo.,LTD). WecertifythatwearenotsubjecttoadenialoffederalbenefitsthatincludesFCCbenefitspursuantto Section5301oftheAnti-DrugAbuseActof1988,21U.S.C.§862,andthatnopartytotheapplication,as definedin47CFR§1.2002(b),issubjecttoadenialoffederalbenefitsthatincludesFCCbenefits pursuanttothatsection. Sincerely, PrintedName:BoJiang Title:R&DManager Tel.:+86076986308806 Fax:+86076986308826 Email:[email protected]

DongguanDareuElectronicsAudioCo.,LTD No.110,shijieshidanMidRd,shijieTown,DongguanCity,Guangdong Province.China ProductSimilarityDeclaration Productname:Headset Modelname:EH925Ultra,TH662 FCCID:2A5PJ-EH925ULTRAD We(DongguanDareuElectronicsAudioCo.,LTD)herebystate thatallthemodelsareelectricalidenticalincludingthesame softwareparameterandhardwaredesign(i.e.,circuitdesign,PCB Layout,RFmodule/circuit,antennatype(s)andantennalocation, componentsonPCB,etc.,),samemechanicalstructureand design(includingproductenclosure,materials,etc.,),theonly differenceisthemodelname. Signature: Name:BoJiang Title:R&DManager Date:Dec.8,25

LabelLocation Confirmtheuseofrealappearancephotosasreferences Label

RFEXPOSUREEVALUATION KDB447498D01MobileandPortableDevicesRFExposureProceduresand EquipmentAuthorizationPoliciesv06. AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeused toevaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF) Radiationasspecifiedin§1.1307(b) EUTSpecification FCCID2A5PJ-EH925ULTRAD EUT Headset Frequencyband(Operating)BT:2.402GHz~2.480GHz WLAN:2.412GHz~2.462GHz RLAN:5.180GHz~5.240GHz RLAN:5.260GHz~5.320GHz RLAN: 5.500 GHz~ 5.700 GHz RLAN:5.745GHz~5.825GHz Others:SRD2.4G:2.402GHz~2.480GHz DevicecategoryPortable(<20cmseparation) Mobile(>20cmseparation) Others___ ExposureclassificationOccupational/Controlledexposure(S=5mW/cm2) GeneralPopulation/Uncontrolledexposure(S=1mW/cm2) AntennadiversitySingleantenna Multipleantennas Txdiversity Rxdiversity Tx/Rxdiversity Antennagain(Max)SRD2.4G:1.15dBi EvaluationappliedMPEEvaluation SAREvaluation LimitsforMaximumPermissibleExposure(MPE) Frequency Range(MHz) ElectricField Strength(V/m) MagneticField Strength(A/m) Power Density(mW/cm 2 ) Average Time (A)LimitsforOccupational/ControlExposures 300-1500----F/3006 1500-100000----56 (B)LimitsforGeneralPopulation/UncontrolExposures 300-1500----F/15006 1500-100000----130 Friistransmissionformula:Pd=(Pout*G)\(4*pi*R2) Where Pd=PowerdensityinmW/cm 2 Pout=outputpowertoantennainMw G=gainofantennainlinearscale Pi=3.1416 R=distancebetweenobservationpointandcenteroftheradiatorincm PdthelimitofMPE,1mW/cm2.Ifweknowthemaximumgainoftheantenna andtotalpowerinputtotheantenna,throughthecalculation,wewillknowthe distancewheretheMPElimitisreached. MaxMeasurementResult OperatingMode Measured Power Tuneup tolerance Max.Tune upPower Antenna Gain Power densityat 20cm Power densityLimits (mW/cm 2 ) (dBm)(dBm)(dBm)(dBi)(mW/cm 2 ) SRD2.4G2.472.47±13.471.150.00061

ReportNo.:1812C50535012501-01 Page 1 of 22 AppendixTestData ReportNo.:1812C50535012501-01TestSampleNo.:1-2-2 StartTestDate:2025-10-13FinishTestDate:2025-10-24 TestEngineer:Auditor: Temperature:24.5°CRelativeHumidity:42% Pressure:101kPa AppendixA:6dBBandwidth TestResult Test Mode AntennaFrequency[MHz] 6dBBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict 2.4GAnt124020.5242401.6602402.1840.5PASS 2.4GAnt124400.5042439.6562440.1600.5PASS 2.4GAnt124800.5122479.6562480.1680.5PASS ReportNo.:1812C50535012501-01 Page 2 of 22 TestGraphs 2.4G-Ant1-2402-PASS 2.4G-Ant1-2440-PASS ReportNo.:1812C50535012501-01 Page 3 of 22 2.4G-Ant1-2480-PASS ReportNo.:1812C50535012501-01 Page 4 of 22 AppendixB:99%OccupiedBandwidth TestResult Test Mode AntennaFrequency[MHz] OCB [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict 2.4GAnt124021.11092401.42272402.5336------ 2.4GAnt124401.14052439.39432440.5348------ 2.4GAnt124801.20532479.32372480.5290------ ReportNo.:1812C50535012501-01 Page 5 of 22 TestGraphs 2.4G-Ant1-2402 2.4G-Ant1-2440 ReportNo.:1812C50535012501-01 Page 6 of 22 2.4G-Ant1-2480 ReportNo.:1812C50535012501-01 Page 7 of 22 AppendixC:Maximumconductedoutputpower TestResultPeak Test Mode Antenna Frequency [MHz] ConductedPeak Power[dBm] Conducted Limit[dBm] Verdict 2.4GAnt124021.00≤20.97PASS 2.4GAnt124401.79≤20.97PASS 2.4GAnt124802.47≤20.97PASS TestGraphsPeak 2.4G-Ant1-2402-PASS ReportNo.:1812C50535012501-01 Page 8 of 22 2.4G-Ant1-2440-PASS 2.4G-Ant1-2480-PASS ReportNo.:1812C50535012501-01 Page 9 of 22 AppendixD:Maximumpowerspectraldensity TestResult TestModeAntennaFrequency[MHz]Result[dBm/3kHz]Limit[dBm/3kHz]Verdict 2.4GAnt12402-18.29≤8.00PASS 2.4GAnt12440-17.50≤8.00PASS 2.4GAnt12480-15.57≤8.00PASS ReportNo.:1812C50535012501-01 Page 10 of 22 TestGraphs 2.4G-Ant1-2402-PASS 2.4G-Ant1-2440-PASS ReportNo.:1812C50535012501-01 Page 11 of 22 2.4G-Ant1-2480-PASS ReportNo.:1812C50535012501-01 Page 12 of 22 AppendixE:Bandedgemeasurements TestResult Test Mode AntennaChName Frequency [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict 2.4GAnt1Low24020.77-48.92≤-19.23PASS 2.4GAnt1High24802.25-48.55≤-17.76PASS Remark:Regardingthespuriousemissionsfrom30MHzto26.5GHz,thecablelosehavebeensetinthe 'offset'oftheSpectrumAnalyzerduringthetest. ReportNo.:1812C50535012501-01 Page 13 of 22 TestGraphs 2.4G-Ant1-2402-PASS 2.4G-Ant1-2480-PASS ReportNo.:1812C50535012501-01 Page 14 of 22 AppendixF:ConductedSpuriousEmission TestResult Test Mode AntennaFrequency[MHz] Freq.Range [MHz] Ref.Level [dBm] Result [dBm] Limit [dBm] Verdict 2.4GAnt124020~Reference2.672.67---PASS 2.4GAnt1240230~10002.67-60.31≤-17.33PASS 2.4GAnt124021000~265002.67-40.73≤-17.33PASS 2.4GAnt124400~Reference0.610.61---PASS 2.4GAnt1244030~10000.61-68.31≤-19.39PASS 2.4GAnt124401000~265000.61-39.53≤-19.39PASS 2.4GAnt124800~Reference0.600.60---PASS 2.4GAnt1248030~10000.60-68.35≤-19.4PASS 2.4GAnt124801000~265000.60-40.21≤-19.4PASS Remark:Regardingthespuriousemissionsfrom30MHzto26.5GHz,thecableloseandattenuator factorshavebeensetinthe'InputCorrection'oftheSpectrumAnalyzerduringthetest. ReportNo.:1812C50535012501-01 Page 15 of 22 TestGraphs 2.4G-Ant1-2402-0~Reference-PASS 2.4G-Ant1-2402-30~1000-PASS ReportNo.:1812C50535012501-01 Page 16 of 22 2.4G-Ant1-2402-1000~26500-PASS 2.4G-Ant1-2440-0~Reference-PASS ReportNo.:1812C50535012501-01 Page 17 of 22 2.4G-Ant1-2440-30~1000-PASS 2.4G-Ant1-2440-1000~26500-PASS ReportNo.:1812C50535012501-01 Page 18 of 22 2.4G-Ant1-2480-0~Reference-PASS 2.4G-Ant1-2480-30~1000-PASS ReportNo.:1812C50535012501-01 Page 19 of 22 2.4G-Ant1-2480-1000~26500-PASS ReportNo.:1812C50535012501-01 Page 20 of 22 AppendixG:DutyCycle TestResult Test Mode Antenna Frequency [MHz] ONTime [ms] Period [ms] DutyCycle [%] DutyCycle Factor[dB] 2.4GAnt124020.100.6315.877.99 2.4GAnt124400.100.6415.638.06 2.4GAnt124800.090.6314.298.45 ReportNo.:1812C50535012501-01 Page 21 of 22 TestGraphs NTNV-2.4G-Ant1-2402 NTNV-2.4G-Ant1-2440 ReportNo.:1812C50535012501-01 Page 22 of 22 NTNV-2.4G-Ant1-2480 ---End---

Page 1 of 31 FCC Test Report Report No.:1812C50535012501 Applicant:Dongguan Dareu Electronics Audio Co., LTD Address: No.110, shijie shidan Mid Rd, shijie Town, Dongguan City, Guangdong Province. China Product Name:Headset Report Date:2025-12-02 Shenzhen Anbotek Compliance Laboratory Limited #检测章# #资质章# Report No.:1812C50535012501Page 2 of 31 FCC ID: 2A5PJ-EH925ULTRAD Contents 1. General Information ...............................................................................................................................6 1.1. Client Information ........................................................................................................................6 1.2. Description of Device (EUT) ........................................................................................................6 1.3. Auxiliary Equipment Used During Test........................................................................................7 1.4. Operation channel list..................................................................................................................7 1.5. Description of Test Modes...........................................................................................................7 1.6. Measurement Uncertainty ...........................................................................................................8 1.7. Additional Instructions .................................................................................................................8 1.8. Test Summary .............................................................................................................................9 1.9. Description of Test Facility ........................................................................................................10 1.10. Disclaimer................................................................................................................................10 1.11. Test Equipment List.................................................................................................................11 2. Antenna requirement ...........................................................................................................................13 2.1. Conclusion.................................................................................................................................13 3. Conducted Emission at AC power line ................................................................................................14 3.1. EUT Operation ..........................................................................................................................14 3.2. Test Setup .................................................................................................................................14 3.3. Test Data ...................................................................................................................................15 4. 6dB Bandwidth ....................................................................................................................................17 4.1. EUT Operation ..........................................................................................................................17 4.2. Test Setup .................................................................................................................................17 4.3. Test Data ...................................................................................................................................17 5. Maximum Conducted Output Power....................................................................................................18 5.1. EUT Operation ..........................................................................................................................18 5.2. Test Setup .................................................................................................................................18 5.3. Test Data ...................................................................................................................................18 6. Power Spectral Density .......................................................................................................................19 6.1. EUT Operation ..........................................................................................................................19 6.2. Test Setup .................................................................................................................................19 6.3. Test Data ...................................................................................................................................19 7. Emissions in non-restricted frequency bands ......................................................................................20 7.1. EUT Operation ..........................................................................................................................20 7.2. Test Setup .................................................................................................................................20 7.3. Test Data ...................................................................................................................................20 8. Band edge emissions (Radiated) ........................................................................................................21 8.1. EUT Operation ..........................................................................................................................21 8.2. Test Setup .................................................................................................................................21 8.3. Test Data ...................................................................................................................................22 9. Emissions in restricted frequency bands (below 1GHz) .................................................................…

Text truncated - open the document above for the full version.

AntennaSpecification Specifications Summary ITEMSPEC. ModelNameMIFA2.4GHz CenterFrequency2400MHz0.86dBi 2440MHz0.27dBi 2480MHz0.48dBi MAX.GAIN1.15dBi PolarizationHorizontal AzimuthBeamPatternOmni-directional Impedance50Ω AntennaLength32.0mm AntennaPhoto&Length(mm) TestDate20240513 Dongguan Dareu Electronics Audio Co., LTD Room 3, Building No. 11, Futian Road, Hetianxia, Shijie Town, Dongguan City, Guangdong province, China 1.Mainantenna:2400MHz 1.1.Polar 1.2Total 2.Mainantenna:2440MHz 2.1Polar 2.2Total 3.Mainantenna:2480MHz 3.1Polar 3.2Total 4测试数据