2AMD8-PROWVivitar Pro True Wireless Earbuds

Rev1/26/2023 ShenzhenGroundEnterprisesCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:05-15-2023 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:(2AMD8-PROW) [ShenzhenGroundEnterprisesCo.,Ltd](“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivinganequipment authorizationpursuanttosection2.903oftheFCCrules. Sincerely, (Applicantsignature) (Applicantprintedname)JamesCao Rev1/26/2023 ShenzhenGroundEnterprisesCo.,Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:05-15-2023 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:(2AMD8-PROW) [ShenzhenGroundEnterprisesCo.,Ltd](“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredListasanentityproducing“covered” equipment. Sincerely, (Applicantsignature) (Applicantprintedname)JamesCao

ShenzhenGroundEnterprisesCo.,Ltd Room607,BuildingF,MingYueHuaDu,GongheIndustrialRd,Xixiang,BaoAnDistrict Date:2023.05.15 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 FCCID:2AMD8-PROW USAgent–AttestationStatement/Part2.911(d)(7) ShenzhenGroundEnterprisesCo.,Ltdcertifies,thatasof2023.05.15,wehavedesignatedFCC USAgent,LLCtoacceptserviceofprocessonourbehalfforFCCID:2AMD8-PROW. ShenzhenGroundEnterprisesCo.,Ltd,acceptstomaintainanagentofserviceofprocessinthe UnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanentlyterminatedall marketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofany Commission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheveris later. FCCUSAgent,LLC,acceptsasofthedateofthefilingofthisapplication,theobligationofbeing thedesignatedagentforthepurposeofacceptingserviceofprocessonbehalfofShenzhen GroundEnterprisesCo.,LtdforFCCID:2AMD8-PROW. DesignatedAgentInformation: CompanyName:FCCUSAgent,LLC FRN:0033402884 Address:3722IllinoisAvenue,SaintCharles,IL,60174,USA ContactPerson:TimPayne Phone:708-571-3148 Email:[email protected] Sincerely, Company:ShenzhenGroundEnterprises Co.,Ltd DesignatedAgent:FCCUSAgent,LLC CompanyRepresentative:JamesCaoDesignatedAgentRepresentative:TimPayne Signature: Signature:

Declarationonmodeldifference Wetheundersignedherebyconfirmthatthesemodelsareidentical,andallmodelshavethesame RFmodule,PCBlayout,Antenna,schematicsandcomponent.Onlydifferentonmodelname. Thelayoutoftheleftandrightearphonesisthesame,butthematerialsusedareslightlydifferent. Theleftsideoftherightearphonehasa1Kresistormorethanthatoftheleftearphone,soasto generateapull-downsignalwhenthesoftwareisconnected.Thesideoftheearphonethat generatesthesignalistherightearphonebydefault,andthiscomponentwillnotaffectthetest. Theleftearphonehasonemoreoutputfiltercapacitorthantherightearphone.Sincetheleft earphoneisthehost,theaudiosignalisfirstsenttotheleftearphone,andthensenttotheright earphoneafterfilteringbythefiltercapacitor.Therightearphonejustreceivesthesignalwithout transmittingit,sothereisnofiltercapacitor,whichhasnoimpactonthetest. ProductionnameTrademarkFCCModelno. VivitarProTrueWireless Earbuds N/A2AMD8-PROW TWSPRO-WHT ， SKU#2198530 Confirmedby: JamesCao ShenzhenGroundEnterprisesCo.,Ltd 2023-05-12

Pleaseproducealetteronyourcompanyletterheadwiththefollowinginformation.The lettermustbesubmittedinPDFform. 2023-05-12 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:CONFIDENTIALITYREQUESTFOR( ProductName：VivitarProTrueWirelessEarbuds ModelNumber：TWSPRO-WHT，SKU#2198530 FCCID：2AMD8-PROW ) ToWhomItMayConcern: Thisletterservesasanofficialrequestforconfidentialityundersections0.457and0.459 ofCFR47.Wehaverequestedthatthe(BlockDiagram,Schematics,Operational Description)requiredtobesubmittedwiththisapplicationbepermanentlywithheld frompublicreview. SPECIFYREASONFORREQUEST(Theabovematerialscontaintradesecrets andproprietaryinformationnotcustomarilyreleasedtothepublic.Thepublic disclosureofthesematerialsmaybeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors.) Pleasecontactmeifthereisanyinformationyoumayneed. Sincerely, JamesCao ShenzhenGroundEnterprisesCo.,Ltd Mustbesignedbytheapplicantcontactcitedastechnicalornon-technicalcontactonthe 731formprovidedtoEurofinsMETLabs,orbytheauthorizedagentifanappropriate authorizedagentletterhasbeenprovided.Letterssignedbytheapplicantshouldbe placedonapplicantletterhead.

ShenzhenGroundEnterprisesCo.,Ltd 2023-05-12 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeSamLvatEMTEK(DONGGUAN)CO.,LTD.toacton ourbehalfinallmattersrelatingtoapplicationforequipmentauthorization,includingthesigning ofalldocumentsrelatingtothesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothe denialofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseAct of1988,21U.S.C.853(a). Thisagreementexpiresoneyearfromthecurrentdate. Sincerely, JamesCao Mustbesignedbytheapplicantcontactcitedastechnicalornon-technicalcontactonthe 731formprovidedtoEurofinsMETLabs,orbytheauthorizedagentifanappropriate authorizedagentletterhasbeenprovided.Letterssignedbytheapplicantshouldbe placedonapplicantletterhead.

FCCID:2AMD8-PROW

Becausetheproductistoosmalltobeprintedontheproduct,the FCCIDisprintedontheusermanualandouterpackaging.

FCCID:2AMD8-PROW ANT ANT

ReportNo.EDG2304230049E00102RPage1of7Ver.1.0 TESTREPORT ProductName：VivitarProTrueWirelessEarbuds ModelNumber：TWSPRO-WHT，SKU#2198530 FCCID：2AMD8-PROW Preparedfor:ShenzhenGroundEnterprisesCo.,Ltd Address:Room607,BuildingF,MingYueHuaDu,GongheIndustrial Rd,Xixiang,BaoAnDistrict Preparedby:EMTEK(DONGGUAN)CO.,LTD. Address:-1&2/F.,Building2,ZoneA,ZhongdaMarineBiotechnology ResearchandDevelopmentBase,No.9,XinchengAvenue, SongshanhuHigh-technologyIndustrialDevelopmentZone, Dongguan,Guangdong,China TEL:+86-0769-22807078 FAX:+86-0769-22807079 ReportNumber:EDG2304230049E00102R Date(s)ofTests:April23,2023toMay8,2023 Dateofissue:May8,2023 $二维码$ ReportNo.EDG2304230049E00102RPage2of7Ver.1.0 TableofContents 1.TESTRESULTCERTIFICATION...............................................................................................................................................3 2.EUTSPECIFICATION.................................................................................................................................................................5 3.TESTREQUIREMENT:...............................................................................................................................................................6 RFEXPOSUREEVALUATION...................................................................................................................................................6 4.MEASUREMENTRESULT.........................................................................................................................................................7 ReportNo.EDG2304230049E00102RPage3of7Ver.1.0 1.TESTRESULTCERTIFICATION Applicant:ShenzhenGroundEnterprisesCo.,Ltd Address: Room607,BuildingF,MingYueHuaDu,GongheIndustrialRd,Xixiang,BaoAn District Manufacturer:FengDaLiPlasticProduct(HuiZhou)Co.,Ltd Address: N0.37,CaoLianPu,HuangPaiCommunity,PingShanTown,HuiDongCounty, HuiZhouCity,China,516300 EUT:VivitarProTrueWirelessEarbuds ModelName:TWSPRO-WHT，SKU#2198530 Trademark:N/A MeasurementProcedureUsed: APPLICABLESTANDARDS STANDARDTESTRESULT §15.247(i),§2.1093 PASS TheaboveequipmentwastestedbyEMTEK(DONGGUAN)CO.,LTD.Thetestdata,dataevaluation,test procedures,andequipmentconfigurationsshowninthisreportweremadeinaccordancewiththeprocedures giveninANSIC63.10(2013)andtheenergyemittedbythesampleEUTtestedasdescribedinthisreportisin compliancewiththerequirementsofFCCRules FCC§15.247(i),§2.1093 . Thetestresultsofthisreportrelateonlytothetestedsampleidentifiedinthisreport DateofTest:April23,2023toMay8,2023 Preparedby: WarrenDeng/Editor Reviewer: TimDong/Supervisor Approve&AuthorizedSigner: SamLv/Manager ReportNo.EDG2304230049E00102RPage4of7Ver.1.0 ModifiedHistory VersionReportNo.RevisionDateSummary EDG2304230049E00102R/OriginalReport ReportNo.EDG2304230049E00102RPage5of7Ver.1.0 2. EUTSpecification CharacteristicsDescription Product:VivitarProTrueWirelessEarbuds ModelNumber: TWSPRO-WHT，SKU#2198530 Thesemodelarethesameexpectthemodelname,Hereselect TWSPRO-WHTfortest. Sample:1# DataRate: 1MbpsforGFSKmodulation 2Mbpsforπ/4-DQPSKmodulation 3Mbpsfor8DPSKmodulation Modulation: GFSK,π/4-DQPSK,8DPSK OperatingFrequency Range(s): 2402-2480MHz NumberofChannels: 79channels TransmitPowerMax: -2.13dBm(0.000612W) AntennaGain:1.7dBi Powersupply: DC5VfromUSB,DC3.7Vfrombattery Evaluationapplied:MPEEvaluation SAREvaluation ReportNo.EDG2304230049E00102RPage6of7Ver.1.0 3. TestRequirement: RFEXPOSUREEVALUATION Accordingto§15.247(i)and§1.1307(b)(1),systemsoperatingundertheprovisionsofthissectionshallbe operatedinamannerthatensuresthatthepublicisnotexposedtoradiofrequencyenergylevelinexcessof theCommission’sguidelines. RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,usingmeasurementsorcomputer simulation.WhenroutineSARevaluationisnotrequired,portabletransmitterswithoutputpowergreaterthan theapplicablelowthresholdrequireSARevaluationtoqualityforTCBapproval. OneantennaisavailablefortheEUT.Theminimumseparationdistanceis5mm. ReportNo.EDG2304230049E00102RPage7of7Ver.1.0 4. MeasurementResult Antennagain:1.7dBi Transmit Frequency( MHz) Mode Measured Power (dBm) Tune upPower (dBm) Maxtuneup power(dBm) Calculation Result 1-g SAR 2.402GFSK -4.06-5±1-4 0.12343 2.441GFSK-3.86-4±1-30.15663 2.480GFSK-3.38-4±1-30.15793 2.402Π/4-DQPSK -3.5-4±1-3 0.15543 2.441Π/4-DQPSK -3.22-4±1-3 0.15663 2.480Π/4-DQPSK -2.66-3±1-2 0.19873 2.4028DPSK-3-4±1-20.19563 2.4418DPSK-2.69-3±1-20.19723 2.4808DPSK-2.13-3±1-20.19873 AccordingtoKDB447498,nostand-alonerequiredforBTantenna,andnosimultaneousSARmeasurementis required. ***EndofReport***

2.4GHz2012ChipAntenna:RANT2012F245C07 Dimension(mm) L2.05+-0.10 W1.20+-0.10 T0.65+-0.10 No.TerminalName 1Feeding/GNG 2GND Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT2012F245C07 (A)(B)(C)(D)(E)(F) (A)ProductType2.4GHz 2012 Chip Antenna (B)SizeCode2.0x1.2mm(+-0.2mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=07 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84(Min.) PeakGain1.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) ThespecificationisdefinedonEVB. DimensionandTerminalConfiguration RAIN International Technology Co., Ltd. 2.4GHz2012ChipAntenna:RANT2012F245C07 EvaluationBoardReference PCBDimensionAntennaLayoutReferenceUnit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2.4GHz2012ChipAntenna:RANT2012F245C07 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 2.4GHz2012ChipAntenna:RANT2012F245C07 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 2.4GHz2012ChipAntenna:RANT2012F245C07 2.4GHz2012ChipAntenna:RANT2012F245C07 _ 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 12020/10/15NewDatasheet Address: 709, Building F, Yuxing Science and Technology Industrial Park, Nanchang Third Industrial Zone, Nanchang Community, xixiang street, Baoan District, Shenzhen. RAIN International Technology Co., Ltd.

ReportNo.EDG2304230049E00101RPage1of72Ver.1.0 TESTREPORT ProductName：VivitarProTrueWirelessEarbuds ModelNumber：TWSPRO-WHT，SKU#2198530 FCCID：2AMD8-PROW Preparedfor:ShenzhenGroundEnterprisesCo.,Ltd Address:Room607,BuildingF,MingYueHuaDu,GongheIndustrial Rd,Xixiang,BaoAnDistrict Preparedby:EMTEK(DONGGUAN)CO.,LTD. Address:-1&2/F.,Building2,ZoneA,ZhongdaMarineBiotechnology ResearchandDevelopmentBase,No.9,XinchengAvenue, SongshanhuHigh-technologyIndustrialDevelopmentZone, Dongguan,Guangdong,China TEL:+86-0769-22807078 FAX:+86-0769-22807079 ReportNumber:EDG2304230049E00101R Date(s)ofTests:April23,2023toMay8,2023 Dateofissue:May8,2023 $二维码$ ReportNo.EDG2304230049E00101RPage2of72Ver.1.0 TableofContents 1TESTRESULTCERTIFICATION..........................................................................................................................................3 2EUTTECHNICALDESCRIPTION.......................................................................................................................................5 3SUMMARYOFTESTRESULT.............................................................................................................................................6 4TESTMETHODOLOGY........................................................................................................................................................7 4.1GENERALDESCRIPTIONOFAPPLIEDSTANDARDS.............................................................................................7 4.2MEASUREMENTEQUIPMENTUSED.........................................................................................................................7 4.3DESCRIPTIONOFTESTMODES.................................................................................................................................8 5FACILITIESANDACCREDITATIONS................................................................................................................................9 5.1FACILITIES.....................................................................................................................................................................9 5.2EQUIPMENT...................................................................................................................................................................9 5.3LABORATORYACCREDITATIONSANDLISTINGS.................................................................................................9 6TESTSYSTEMUNCERTAINTY.........................................................................................................................................10 7SETUPOFEQUIPMENTUNDERTEST............................................................................................................................11 7.1RADIOFREQUENCYTESTSETUP1.........................................................................................................................11 7.2RADIOFREQUENCYTESTSETUP2.........................................................................................................................11 7.3CONDUCTEDEMISSIONTESTSETUP....................................................................................................................13 7.4BLOCKDIAGRAMCONFIGURATIONOFTESTSYSTEM....................................................................................14 7.5SUPPORTEQUIPMENT...............................................................................................................................................14 8FREQUENCYHOPPINGSYSTEMREQUIREMENTS.....................................................................................................15 8.1StandardApplicable........................................................................................................................................................15 8.2EUTPseudorandomFrequencyHoppingSequence.......................................................................................................15 8.3EqualHoppingFrequencyUse.......................................................................................................................................16 8.4FrequencyHoppingSystem............................................................................................................................................16 9TESTREQUIREMENTS......................................................................................................................................................17 9.120DB&99%BANDWIDTH............................................................................................................................................17 9.2CARRIERFREQUENCYSEPARATION.....................................................................................................................24 9.3NUMBEROFHOPPINGFREQUENCIES...................................................................................................................28 9.4AVERAGETIMEOFOCCUPANCY(DWELLTIME)................................................................................................30 9.5MAXIMUMPEAKCONDUCTEDOUTPUTPOWER...............................................................................................36 9.6CONDUCTEDSUPRIOUSEMISSION........................................................................................................................48 9.7RADIATEDSPURIOUSEMISSION............................................................................................................................58 9.8CONDUCTEDEMISSIONTEST.................................................................................................................................67 9.9ANTENNAAPPLICATION...........................................................................................................................................70 ReportNo.EDG2304230049E00101RPage3of72Ver.1.0 1TESTRESULTCERTIFICATION Applicant:ShenzhenGroundEnterprisesCo.,Ltd Address: Room607,BuildingF,MingYueHuaDu,GongheIndustrialRd,X…

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FCCID:2AMD8-PROW