2BFXU-TWS266True Wireless Open Earbuds

DongguanYinquTechnologyCo.,Ltd Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:Feb.24,26 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID:2BFXU-TWS266 DongguanYinquTechnologyCo.,Ltd(“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§1.50002of referencechapter,asanentityproducing“covered”communicationequipment.Theequipmentfor whichauthorizationissoughtisnot“covered”telecommunicationsequipmentandvideosurveillance equipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibitedfrom receivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, ApplicantSignature PrintedName:NancyLiu Title: Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity,Guangdong Province,China Tel.:13480128981 Email:[email protected]

DongguanYinquTechnologyCo.,Ltd Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Feb.24,26 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:[2BFXU-TWS266] ProductName:[TrueWirelessOpenEarbuds] Thisletterservesasanattestationthattheequipmentidentifiedabove☐is/☒isnot(selectone)"covered" softwareasdefinedundertheFederalCommunicationsCommission(FCC)CoveredListrequirements,as outlinedinFCC22-84andKDB986446. 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, ApplicantSignature PrintedName:NancyLiu Title: Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity,Guangdong Province,China Tel.:13480128981 Email:[email protected] DongguanYinquTechnologyCo.,Ltd Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,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

DongguanYinquTechnologyCo.,Ltd Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China FileNo.:2026SNUSDA024 U.S.AgentLetterofAttestation To:FederalCommunicationsCommission 7435OaklandMillsRoad,Columbia,MD21046,USA Date:Mar.2,26 Ref: AttestationStatement–Part 2.911(d)(7)filing FCCID:2BFXU-TWS266 [DongguanYinquTechnologyCo.,Ltd](“theapplicant”)certifiesthat,asofthedateofthefilingof theapplication,[TTSMARKETINC.](“theagent”)isourdesignatedU.S.agentforserviceof processfortheabovereferenceFCCID.Theapplicantacceptstomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment, whicheverislater.TheapplicantfurtheracknowledgesitisourresponsibilitytoinformtheFCC whenevertheagentinformationchanges. [TTSMARKETINC.]("theagent)understanditistheagent'sobligationtoacceptserviceofprocess intheUnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S. addressandemailaddress. DesignatedU.S.Agent CompanyName:TTSMARKETINC. FRN:0036806057 GC:N/A Address:1178BroadwaySte324,NewYork,NY 10001.USA Signature: ContactPerson:MaverickLim Tel:001-(646)305-2908Email:[email protected] Applicant CompanyName:DongguanYinquTechnologyCo.,Ltd FRN:0035301001 Address:Room201,Building1,No.65Zhengwei FourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China Signature: ContactPerson:NancyLiu Tel:13480128981Email:[email protected]

DongguanYinquTechnologyCo.,Ltd Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China (Feb.24,26) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:ConfidentialityRequestfor:FCCID:2BFXU-TWS266 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 Sincerely, (Signature) Title: Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China Tel.:13480128981 Email:[email protected]

DongguanYinquTechnologyCo.,Ltd Address:Room201,Building1,No.65ZhengweiFourthRoad,DongkengTown,DongguanCity, GuangdongProvince,China (Feb.24,26) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:AgentAuthorizationforFCCID:2BFXU-TWS266 I,theundersigned,herebyauthorize(ShenzhenBKCTestingCo.,Ltd.)toactonourbehalfinallmatters relatingtothisapplicationforequipmentcertification. Anyactcarriedoutby(ShenzhenBKCTestingCo.,Ltd.)shallhavethesameeffectasourownandI acknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsofcertification,as specifiedbyDERYCOMCERTIFICATIONSERVICES,INC.,stillresideswith(DongguanYinqu TechnologyCo.,Ltd). WecertifythatwearenotsubjecttoadenialoffederalbenefitsthatincludesFCCbenefitspursuantto Section5301oftheAnti-DrugAbuseActof1988,21U.S.C.§862,andthatnopartytotheapplication,as definedin47CFR§1.2002(b),issubjecttoadenialoffederalbenefitsthatincludesFCCbenefits pursuanttothatsection. Sincerely, (Signature) (FullnameofcontactpersonlistedonFCC’swebsite) (Title): Tel:13480128981 Fax:075589366592 Email:[email protected]

DongguanYinquTechnologyCo.,Ltd ProductSimilarityDeclaration Productname:TrueWirelessOpenEarbuds Modelname:TWS266,QAIROPEN-BLK,QAIROPEN-OAT Trademark:QUIKCELL FCCID:2BFXU-TWS266 We(DongguanYinquTechnologyCo.,Ltd)herebystatethatall themodelsareelectricalidenticalincludingthesamesoftware parameterandhardwaredesign(i.e.,circuitdesign,PCBLayout, RFmodule/circuit,antennatype(s)andantennalocation, componentsonPCB,etc.,),samemechanicalstructureand design(includingproductenclosure,materials,etc.,),theonly differencearethemodelnumberandthecolor. Signature: Name:NancyLiu Title: Place,date:Dongguan,2026.03.02

FCCID:2BFXU-TWS266ExternalPhotos

FCC ID: 2BFXU-TWS266 True Wireless Open Earbuds TWS266

Label: Theproductdoesnothaveenoughspacetoplacethelabel,andFCCIDislocatedinthe usermanualandpackage.

InternalPhotos FCCID:2BFXU-TWS266 ChipAnt

FCCID:2BFXU-TWS266 RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤5.0mm,the1-gand10-gSARtest exclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f (GHz) ]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, SoaSARtestisnotrequired ModeFrequen cy (MHz) Max Power (dBm) Target power W/tolerance (dBm) Maxtune uppower tolerance (dBm) Max Power (mW) Min. Distance (mm) Calc. thresholds limit EDR GFSK 2402-5.91 -5±1 -40.39815.000.12343.0 2441-5.72 -5±1 -40.39815.000.12443.0 2480-5.50-5±1-40.39815.000.12543.0 Π /4-DQ PSK 2402-4.92-4±1-30.50125.000.15543.0 2441-4.66 -4±1 -30.50125.000.15663.0 2480-4.44 -4±1 -30.50125.000.15793.0

2.4GHz1608ChipAntenna:RANT0603F245S5 _ Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT0603F245S5 (A)(B)(C)(D)(E)(F) ElectricalSpecification DimensionandTerminalConfiguration No.TerminalName 1Feeding/GNG 2GND/Feeding (A)ProductTypeChipAntenna (B)SizeCode 1.6x0.8mm( ± 0.1mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=5 WorkingFrequencyRange2400~2500MHz Bandwidth120MHz(Min.) PeakGain2.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature(°C)-40~85°C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) Dimension(mm) L 1.60±0.10 W 0.80±0.10 T 0.45±0.10 咏成國際科技有限公司 電話 :13530576606 RAINInternationalTechnologyCo.,Ltd. TEL:13530576606 2.4GHz1608ChipAntenna:RANT0603F245S5 _ 1 EvaluationBoardReference PCBDimensionUnit:mm ReturnLoss&Radiation 2.4GHz1608ChipAntenna:RANT0603F245S5 _ 2.4GHz1608ChipAntenna:RANT0603F245S5 _ TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 16087”4K/Reel 4.0±0.5 4.0±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTψDP PaperType1608 1.90±0.203.50±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.10 1.50±0.10 4.0±0.1 2.4GHz1608ChipAntenna:RANT0603F245S5 _ ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz1608ChipAntenna:RANT0603F245S5 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12019/03/01NewDatasheet 22020/02/22Add2Dradiationcharacteristic

FCCIDEDR FCC_BT(Part15.247)TestData ReportNo.:BKC26010422AE-1 FCCID:2BFXU-TWS266 TableofContents 1.DutyCycle.....................................................................................................................................................................2 2.-20dBBandwidth..........................................................................................................................................................5 3.99%OccupiedBandwidth............................................................................................................................................8 4.PeakOutputPower.....................................................................................................................................................11 5.SpuriousEmissions.....................................................................................................................................................14 6.Bandedge....................................................................................................................................................................20 7.CarrierFrequenciesSeparation(Hopping).................................................................................................................28 8.NumberofHoppingChannel(Hopping)....................................................................................................................31 9.DwellTime(Hopping).................................................................................................................................................32 Page2of37 1.DutyCycle ConditionAntennaRateFrequency(MHz)Dutycycle(%)Duty_factor NVNTANT11-DH12402.0032.264.91 NVNTANT11-DH12441.0032.264.91 NVNTANT11-DH12480.0031.754.98 NVNTANT12-DH12402.0031.754.98 NVNTANT12-DH12441.0031.754.98 NVNTANT12-DH12480.0031.754.98 Duty_Cycle_NVNT_ANT1_1-DH1_2402 Duty_Cycle_NVNT_ANT1_1-DH1_2441 Duty_Cycle_NVNT_ANT1_1-DH1_2480 Page3of37 Duty_Cycle_NVNT_ANT1_2-DH1_2402 Duty_Cycle_NVNT_ANT1_2-DH1_2441 Page4of37 Duty_Cycle_NVNT_ANT1_2-DH1_2480 Page5of37 2.-20dBBandwidth ConditionAntennaModulationFrequency(MHz)-20dBBW(MHz)iflargerthanCFS NVNTANT11-DH12402.000.873No NVNTANT11-DH12441.000.872No NVNTANT11-DH12480.000.879No NVNTANT12-DH12402.001.250Yes NVNTANT12-DH12441.001.248Yes NVNTANT12-DH12480.001.246Yes -20dB_Bandwidth_NVNT_ANT1_1-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2441_00 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2480_00 Page6of37 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2441_00 Page7of37 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2480_00 Page8of37 3.99%OccupiedBandwidth ConditionAntennaModulationFrequency(MHz)99%%BW(MHz) NVNTANT11-DH12402.000.832 NVNTANT11-DH12441.000.828 NVNTANT11-DH12480.000.832 NVNTANT12-DH12402.001.167 NVNTANT12-DH12441.001.166 NVNTANT12-DH12480.001.165 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2441_00 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2480_00 Page9of37 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2441_00 Page10of37 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2480_00 Page11of37 4.PeakOutputPower ConditionAntennaModulation Frequency (MHz) Max.Conducted Power(dBm) Max.Conducted Power(mW) Limit(mW)Result NVNTANT11-DH12402.00-5.910.261000Pass NVNTANT11-DH12441.00-5.720.271000Pass NVNTANT11-DH12480.00-5.500.281000Pass NVNTANT12-DH12402.00-4.920.32125Pass NVNTANT12-DH12441.00-4.660.34125Pass NVNTANT12-DH12480.00-4.440.36125Pass Peak_Output_Power_NVNT_ANT1_1-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_1-DH1_2441_00 Peak_Output_Power_NVNT_ANT1_1-DH1_2480_00 Page12of37 Peak_Output_Power_NVNT_ANT1_2-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_2-DH1_2441_00 Page13of37 Peak_Output_Power_NVNT_ANT1_2-DH1_2480_00 Page14of37 5.SpuriousEmissions ConditionAntennaModulationTXModeRef_level(dBm) Spurious MAX.Value(dBm) LimitResult NVNTANT11-DH12402.00-6.252-48.135-26.252Pass NVNTANT11-DH12441.00-5.994-46.177-25.994Pass NVNTANT11-DH12480.00-5.787-45.441-25.787Pass NVNTANT12-DH12402.00-6.235-46.728-26.235Pass NVNTANT12-DH12441.00-5.993-45.958-25.993Pass NVNTANT12-DH12480.00-5.796-45.167-25.796Pass 1_Reference_Level_NVNT_ANT1_1-DH1_2402_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2402_00 1_Reference_Level_NVNT_ANT1_1-DH1_2441_00 Page15of37 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2441_00 1_Reference_Level_NVNT_ANT1_1-DH1_2480_00 Page16of37 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2480_00 1_Reference_Level_NVNT_ANT1_2-DH1_2402_00 Page17of37 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2402_00 1_Reference_Level_NVNT_ANT1_2-DH1_2441_00 Page18of37 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2441_00 1_Reference_Level_NVNT_ANT1_2-DH1_2480_00 Page19of37 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2480_00 Page20of37 6.Bandedge ConditionAntennaModulationTXModeRef_level(dBm)BandedgeMAX.ValueLimitResult NVNTANT11-DH12402.00-6.252-57.072-26.252Pass NVNTANT11-DH1Hopping_LCH-5.530-58.065-25.530Pass NVNTANT11-DH12480.00-5.787-66.261-25.787Pass NVNTANT11-DH1Hopping_HCH-5.480-64.703-25.480Pass NVNTANT12-DH12402.00-6.235-57.454-26.235Pass NVNTANT12-DH1Hopping_LCH-5.697-56.174-25.697Pass NVNTANT12-DH12480.00-5.796-67.380-25.796Pass NVNTANT12-DH1Hopping_HCH-5.416-64.863-25.416Pass 1_Reference_Level_NVNT_ANT1_1-DH1_2402_00 2_Bandedge_NVNT_ANT1_1-DH1_2402_00 1_Reference_Level_Hopping_NVNT_ANT1_1-DH1_Hopping Page21of37 2_Band_Edge_(Hopping)_NVNT_ANT1_1-DH1_Hopping 1_Reference_Level_NVNT_ANT1_1-DH1_2480_00 Page22of37 2_Bandedge_NVNT_ANT1_1-DH1_2480_00 1_Reference_Level_Hopping_NVNT_ANT1_1-DH1_Hopping Page23of37 2_Band_Edge_(Hopping)_NVNT_ANT1_1-DH1_Hopping 1_Reference_Level_NVNT_ANT1_2-DH1_2402_00 Page24of37 2_Bandedge_NVNT_ANT1_2-DH1_2402_00 1_Reference_Level_Hopping_NVNT_ANT1_2-DH1_Hopping Page25of37 2_Band_Edge_(Hopping)_NVNT_ANT1_2-DH1_Hopping 1_Reference_Level_NVNT_ANT1_2-DH1_2480_00 Page26of37 2_Bandedge_NVNT_ANT1_2-DH1_2480_00 1_Reference_Level_Hopping_NVNT_ANT1_2-DH1_Hopping Page27of37 2_Band_Edge_(Hopping)_NVNT_ANT1_2-DH1_Hopping Page28of37 7.Car…

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ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26010422AE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of29 TESTREPORT Applicant:DongguanYinquTechnologyCo.,Ltd Address: Room201,Building1,No.65ZhengweiFourthRoad,Dongkeng Town,DongguanCity,GuangdongProvince,China Manufacturer:DongguanYinquTechnologyCo.,Ltd Address: Room201,Building1,No.65ZhengweiFourthRoad,Dongkeng Town,DongguanCity,GuangdongProvince,China ProductName:TrueWirelessOpenEarbuds ModelNumber:TWS266,QAIROPEN-BLK,QAIROPEN-OAT Trademark:QUIKCELL FCCID:2BFXU-TWS266 TestDate: Jan.12,2026–Jan.29,2026 DateofReport: Jan.29,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSI C63.10-2020+Cor.1-2023 Preparedby(TestEngineer): CareyZheng Reviewer(Supervisor): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26010422AE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of29 TABLEOFCONTENT 1.GeneralInformation......................................................................................5 1.1.DescriptionofDevice(EUT).......................................................................................................................5 1.2.ChannelList..................................................................................................................................................5 1.3.Summaryoftestresult................................................................................................................................6 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................6 1.5.Testmode......................................................................................................................................................6 1.6.Testconfiguration.........................................................................................................................................6 1.7.BlockDiagram...............................................................................................................................................7 1.8.TestConditions.............................................................................................................................................7 1.9.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................7 1.10.TestFacility..................................................................................................................................................8 1.11.TestEquipment...........................................................................................................................................8 2.Conductedemissionatthemainsterminalstest....................................10 2.1.Limit..............................................................................................................................................................10 2.2.TestSetup....................................................................................................................................................10 2.3.TestProcedure............................................................................................................................................10 2.4.TestResult...................................................................................................................................................11 3.RadiatedSpuriousEmissions...................................................................13 3.1.Limit..............................................................................................................................................................13 3.2.TestSetup....................................................................................................................................................14 3.3.TestProcedure............................................................................................................................................16 3.4.TestResult...................................................................................................................................................17 4.MaximumPeakOutputPower....................................................................22 4.1.Limit..............................................................................................................................................................22 4.2.TestSetup....................................................................................................................................................22 4.3.TestProcedure............................................................................................................................................22 4.4.TestResult...................................................................................................................................................22 5.-20dBBandwidthMeasurement...............................................................23 5.1.Limit..............................................................................................................................................................23 5.2.TestSetup....................................................................................................................................................23 5.3.TestProcedure............................................................................................................................................23 5.4.TestResult...................................................................................................................................................23 6.CarrierFrequencySeparationTest...............…

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TestPhoto FCCID:2BFXU-TWS266