2BBFG-3G-PROWireless Earphone

User's Manual Wireless Earphone 3G PRO FCC Requirement Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

SuZhouDrachTechnologyCo.Ltd Date：2023-7-3 ProductModelNumber:U4,U5PLUS,U3PLUS,2GPLUS,3GPRO,P9, 5G,4G,F2,F3,F4,F5,W2,W3,W4,W5,UF2,UF3,UF4,UF5,U2,U3,U4, U5,K2,K3,K4,K5,M2,M3,M4,M5,R2,R3,R4,R5 FCCID：2BBFG-3G-PRO Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatORGANIZATION.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyORGANIZATION.onourbehalf shallhavethesameeffectasactsofourown. By:RANSONG ContactListedonFCCWesbite Title:Manager Email:[email protected] Telephone:0512-65168602 Onbehalfof:SuZhouDrachTechnologyCo.Ltd

SuZhouDrachTechnologyCo.Ltd FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:2023-7-3 FCCID:2BBFG-3G-PRO Ref.#1:AttestationStatementsPart2.911(d)(5)(i)Filing SuZhouDrachTechnologyCo.Ltdcertifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorization pursuanttosection2.903oftheFCCrules. Ref.#2:AttestationStatementsPart2.911(d)(5)(ii)Filing SuZhouDrachTechnologyCo.Ltdcertifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredListasanentityproducing “covered”equipment. Applicant:SuZhouDrachTechnologyCo.Ltd Address:B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina ContactPerson:RANSONG Tel.:0512-65168602 Email:[email protected] Sincerely, Signature:

SuZhouDrachTechnologyCo.Ltd Address:B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina FRN:0033834599 Date:2023-7-3 FederalCommunicationsCommission AuthorizationandEvaluationDivision 1435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BBFG-3G-PRO SuZhouDrachTechnologyCo.Ltdcertifiesthat,asofthedateofthefilingoftheapplication,T &HJYLLCisourdesignatedU.S.agentforserviceofprocessfortheabovereferencedFCC ID.SuZhouDrachTechnologyCo.Ltdacceptstomaintainanagentfornolessthanoneyear afterthegranteehasterminatedallmarketingandimportationortheconclusionofany Commission-relatedproceedinginvolvingtheequipment. T&HJYLLCaccepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:T&HJYLLC Address:220ERUBYAVE,1FLPALISADESPARK,NEWJERSEY07650,UNITEDSTATES FRN:0033964818 ContactPerson:HUANZHULIANG Tel.:347-654-0578 Email:[email protected] Sincerely, SignedonbehalfofSuZhouDrach TechnologyCo.Ltd SignedonbehalfofT&HJYLLC Name:RANSONGName:HUANZHULIANG Title:0512-65168602Title:347-654-0578 Date:2023-7-3Date:2023-7-3

SuZhouDrachTechnologyCo.Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:July4,2023 Subject;RequestforConfidentiality FCCID:2BBFG-3G-PRO ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram OperationalDescription Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:RANSONG Title:Manager

SuZhouDrachTechnologyCo.Ltd ModelConfirmationLetter We,SuZhouDrachTechnologyCo.LtdCertifytheproduct:WirelessEarphone ModelNo.:U4, U5PLUS,U3PLUS,2GPLUS,3GPRO,P9,5G,4G,F2,F3,F4,F5,W2,W3,W4,W5,UF2,UF3, UF4,UF5,U2,U3,U4,U5,K2,K3,K4,K5,M2,M3,M4,M5,R2,R3,R4,R5 Theirelectricalcircuitdesign,layout,componentsusedandinternalwiringareidentical, Onlythemodelnamearedifferent. 2023-5-29

SMD CERAMIC ANTENNA Data Sheet For 2400-2484MHz CS-2450-31-A 3.2x1.6mm [EIA1206] Rev. 1.1 | 1 Wide bandwidth,lowcost Rev. 1.1 | 2 Light weight,compact Built-in antenna with high gain SHAPES AND DIMENSIONS Dimensions in mm FEATURES APPLICATIONS Bluetooth IEEE802.11g/b Zigbee systems,etc... L WA H 3.10 ± 0.10 1.55 ± 0.10 0.40 ± 0.20 0.50 ± 0.10 Size Material FrequencyType Data
Sheet SMD CERAMIC ANTENNA TECHNOLOGY 2. 67 dB i 72. 30 % 50 W El ect ri cal C h a r a ct e ri st i c s p e r l in e ( TA = 2 5 °C ) Fr e q u e n c y B a n d P o l a r iz a t i o n Line P e ak G a in Eff i c i e n c y Im p e n da n ce P a r t N u m b e r in g Sy ste m CS - 2450 - 31 - A MHz U n i t s 2400~2483 S p ec if i ca t i o n P a r a m e t e r Rev. 1.1 | 4 EVALUATION BOARD Top copper punching Bottom copper Bottom copper Top copper ANT Rev. 1.1 | 5 RADIATION PATTERNS 2.4GHz WLAN BAND ◎ 3D Gain Pattern (24 0 0 MHz) 2.18 1.34 0.5 -0.34 -1.18 -2.02 -2.86 -3.7 -4.54 -5.38 -6.22 -7.07 -7.91 -8.75 -9.59 -10.4 -11.3 -12.1 ◎ 3D Gain Pattern (2440 MHz) 2.6 1.69 0.78 -0.13 -1.05 -1.96 -2.87 -3.78 -4.69 -5.61 -6.52 -7.43 -8.34 -9.26 -10.2 -11.1 -12 -12.9 ◎ 3D Gain Pattern (2480 MHz) 1.81 1.09 0.36 -0.37 -1.09 -1.82 -2.54 -3.27 -4 -4.72 -5.45 -6.18 -6.9 -7.63 -8.35 -9.08 -9.81 -10.5 Rev. 1.1 | 6 FREQUENCY CHARACTERISTICS EFFICIENCY AND VSWR Pre heating Rev. 1.1 | 7 RECOMMENDED REFLOW PROFILE 60-180s 60-150s 20-40s 150 - 200°C 217°C 260°C T e m p e r a t u r e ( ° C ) Time(s) Rev. 1.1 | 8 PACKAGING STYLE REEL DIMENSIONS TAPE DIMENSIONS F ea t u r eS p ec ifi ca t i o n s W P E 4. 0 8.00 0 1.75 F P T o l e r a n ces ±0.30 ±0.10 ±0.10 ±0.10 2 3.50 2.00 D1. 50 P o 1 0 P o ±0.10 +0.10 -0.00 ±0.10 4.00 40.00 ±0.20 Typing Quantity: 5000 pieces per 7” reel Order Information Device Package NetWeight Carrier Quantity Tape & Ree HSF Status CS-2450-31-A 3216 l 5000pcs RoHS compliant Revision histor y Date Revision First Versio Description of changes n The contents of this data sheet are subject to change without notice. Please confirm the specifications and delivery conditions when placing your order. © Copyright 2015, Keweixin Electronics All rights reserved 2018-11-5 0.0089g 1.0 Rev. 1.1 | 8 1.1 Update the package information 2022- 8- 5

ExternalPhotos

27mm Model:3G PRO Input:5Vdc,1A Capacity:200mAh 3.7V 0.74Wh Made In China FCC ID:2BBFG-3G-PRO

InternalPhotos ANT

ShenzhenHuaxiaTestingTechnologyCo.,Ltd 1F.,BlockAofTongshengTechnologyBuilding,HuahuiRoad,DalangStreet,LonghuaDistrict, Shenzhen,China Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V05 ReportTemplateRevisionDate:2021-11-03 RFExposureEvaluationReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20230500923E-02 Applicant: SuZhouDrachTechnologyCo.Ltd AddressofApplicant: B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina EquipmentUnderTest(EUT): EUTName: WirelessEarphone ModelNo.: U4,U5PLUS,U3PLUS,2GPLUS,3GPRO,P9,5G,4G,F2,F3,F4,F5,W2, W3,W4,W5,UF2,UF3,UF4,UF5,U2,U3,U4,U5,K2,K3,K4,K5,M2,M3, M4,M5,R2,R3,R4,R5 TestModelNo.: 3GPRO BrandName: N/A FCCID:2BBFG-3G-PRO Standards: 47CFRPart1.1307 47CFRPart2.1093 KDB447498D04InterimGeneralRFExposureGuidancev01 DateofReceipt:2023-05-29 DateofTest: 2023-05-29to2023-6-6 DateofIssue:2023-7-3 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-02 Page:2of7 1Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20230500923E-02Rev.01 Initialreport 2023-7-3 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-02 Page:3of7 2Contents Page 1VERSION............................................................................................................................................................................2 2CONTENTS........................................................................................................................................................................3 ..................................................................................................................................................................................................3 3GENERALINFORMATION..............................................................................................................................................4 3.1CLIENTINFORMATION...................................................................................................................................................4 3.2GENERALDESCRIPTIONOFEUT...................................................................................................................................4 3.3GENERALDESCRIPTIONOFBT......................................................................................................................................4 4SAREVALUATION...........................................................................................................................................................5 4.1RFEXPOSURECOMPLIANCEREQUIREMENT.................................................................................................................5 4.1.1StandardRequirement......................................................................................................................................5 4.1.2Limits....................................................................................................................................................................5 4.1.3EUTRFExposure..............................................................................................................................................7 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-02 Page:4of7 3GeneralInformation 3.1ClientInformation Applicant: SuZhouDrachTechnologyCo.Ltd AddressofApplicant: B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina Manufacturer: SuZhouDrachTechnologyCo.Ltd AddressofManufacturer: B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina Factory: SuZhouDrachTechnologyCo.Ltd AddressofFactory: B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina 3.2GeneralDescriptionofEUT ProductName: WirelessEarphone ModelNo.: U4,U5PLUS,U3PLUS,2GPLUS,3GPRO,P9,5G,4G,F2,F3,F4,F5, W2,W3,W4,W5,UF2,UF3,UF4,UF5,U2,U3,U4,U5,K2,K3,K4,K5,M2, M3,M4,M5,R2,R3,R4,R5 TestModelNo.:3GPRO TradeMark: N/A SoftwareVersion: V1.0 HardwareVersion: V1.2 PowerSupply: ChargingBox:DC3.7V200mAh,ChargebyDC5Vforadapter Earphone:DC3.7V30mAh 3.3GeneralDescriptionofBT OperationFrequency:2402MHz~2480MHz ModulationType:GFSK,π/4DQPSK TransferRate:1Mbps/2Mbps NumberofChannel:79 ProductType:MobilePortableFixLocation AntennaType: Chipantenna AntennaGain: 2.67dBi ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-02 Page:5of7 4SAREvaluation 4.1RFExposureComplianceRequirement 4.1.1StandardRequirement 447498D04InterimGeneralRFExposureGuidancev01 3.2.SARTestReductionGuidance SARtestreductionprocedures[Glossary]allowusingaparticularsetoftestdataasrepresentative ofother,similar,testconditions.Thismaybeappliedfordatawithindifferenttestpositions(e.g.body, head,extremity),wirelessmodes(e.g.Wi-Fi,cellular),andfrequencybands.Thistestreductionprocess providesfortheuseoftestdataforonespecificchannel,whilereferencingtothosedatafordemonstrating complianceinotherrequiredchannelsforeachtestpositionofanexposurecondition,withintheoperating modeofafrequencyband.Thisislimitedspecificallytowhenthereported1-gor10-gSARforthemid- bandorhighestoutputpowerchannelmeetsanyofthefollowingconditions. 4.1.2Limits SAR-basedthresholdsarederivedbasedonfrequency,power,andseparationdistanceoftheRF source.Theformuladefinesthethresholdsingeneralforeitheravailablemaximumtimeaveragedpoweror maximumtime-averagedERP,whicheverisgreater. IftheERPofadeviceisnoteasilydetermined,suchasforaportabledevicewithasmallform factor,theapplicantmayusetheavailablemaximumtime-averagedpowerexclusivelyifthe deviceantennaorradiatingstructuredoesnotexceedanelectricallengthofλ/4. Asfordeviceswithantennasoflengthgreaterthanλ/4wherethegainisnotwelldefined,but alwayslessthanthatofahalf-wavedipole…

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ShenzhenHuaxiaTestingTechnologyCo.,Ltd. 1F.,BlockAofTongshengTechnologyBuilding,HuahuiRoad,DalangStreet,LonghuaDistrict, Shenzhen,China Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V05 ReportTemplateRevisionDate:2021-11-03 TestReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20230500923E-01 Applicant: SuZhouDrachTechnologyCo.Ltd AddressofApplicant: B1108,Building2,588BingheRoad,HighTechDistrict,SuzhouChina EquipmentUnderTest(EUT): Product: WirelessEarphone ModelNo.: U4,U5PLUS,U3PLUS,2GPLUS,3GPRO,P9,5G,4G,F2,F3,F4,F5,W2, W3,W4,W5,UF2,UF3,UF4,UF5,U2,U3,U4,U5,K2,K3,K4,K5,M2,M3, M4,M5,R2,R3,R4,R5 TestModelNo.: 3GPRO BrandName: N/A FCCID: 2BBFG-3G-PRO Standards:47CFRPart15,SubpartC DateofReceipt:2023-05-29 DateofTest: 2023-05-29to2023-6-6 DateofIssue:2023-7-3 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:2of83 Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20230500923E-01Rev.01 Initialreport 2023-7-3 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:3of83 1TestSummary TestItemTestRequirementTestmethodResult AntennaRequirement47CFRPart15.203/PASS ACPowerLineConducted Emission 47CFRPart15,SubpartCSection 15.207 ANSIC63.10-2013PASS ConductedPeakOutput Power 47CFRPart15.207ANSIC63.10-2013PASS 20dBOccupiedBandwidth47CFRPart15.247ANSIC63.10-2013PASS CarrierFrequencies Separation 47CFRPart15.247ANSIC63.10-2013PASS HoppingChannelNumber47CFRPart15.247ANSIC63.10-2013PASS DwellTime47CFRPart15.247ANSIC63.10-2013PASS PseudorandomFrequency HoppingSequence 47CFRPart15.247ANSIC63.10-2013PASS Band-edgeforRF ConductedEmissions 47CFRPart15.247ANSIC63.10-2013PASS RFConductedSpurious Emissions 47CFRPart15.247ANSIC63.10-2013PASS RadiatedSpurious emissions 47CFRPart15.209ANSIC63.10-2013PASS Restrictedbandsaround fundamentalfrequency (RadiatedEmission) 47CFRPart15.205/15.209ANSIC63.10-2013PASS Remark: Thetestedsample(s)andthesampleinformationareprovidedbytheclient. Tx:InthiswholereportTx(ortx)meansTransmitter. Rx:InthiswholereportRx(orrx)meansReceiver. RF:InthiswholereportRFmeansRadiatedFrequency. CH:InthiswholereportCHmeanschannel. Volt:InthiswholereportVoltmeansVoltage. Temp:InthiswholereportTempmeansTemperature. Humid:InthiswholereportHumidmeanshumidity. Press:InthiswholereportPressmeansPressure. N/A:Inthiswholereportnotapplication ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:4of83 2Contents Page VERSION.............................................................................................................................................................................2 1TESTSUMMARY............................................................................................................................................................3 2CONTENTS......................................................................................................................................................................4 3GENERALINFORMATION...........................................................................................................................................5 3.1CLIENTINFORMATION.................................................................................................................................................5 3.2GENERALDESCRIPTIONOFEUT.................................................................................................................................5 3.3ADDITIONALINSTRUCTIONS........................................................................................................................................7 3.4TESTENVIRONMENT...................................................................................................................................................8 3.5DESCRIPTIONOFSUPPORTUNITS...............................................................................................................................8 3.6STATEMENTOFTHEMEASUREMENTUNCERTAINTY....................................................................................................9 3.7TESTLOCATION........................................................................................................................................................10 3.8TESTFACILITY..........................................................................................................................................................10 3.9ABNORMALITIESFROMSTANDARDCONDITIONS......................................................................................................10 3.10OTHERINFORMATIONREQUESTEDBYTHECUSTOMER..........................................................................................10 3.11EQUIPMENTLIST.....................................................................................................................................................11 4TESTRESULTSANDMEASUREMENTDATA.....................................................................................................12 4.1ANTENNAREQUIREMENT..........................................................................................................................................12 4.2CONDUCTEDEMISSIONS............................................................................................................................................13 4.3CONDUCTEDPEAKOUTPUTPOWER.........................................................................................................................17 4.420DBOCCUPIEDBANDWIDTH...................................................................................................................................22 4.…

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ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:51of83 DH5_Ant1_2480_1000~26500 2DH5_Ant1_2402_0~Reference ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:52of83 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:53of83 2DH5_Ant1_2441_0~Reference 2DH5_Ant1_2441_30~1000 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:54of83 2DH5_Ant1_2441_1000~26500 2DH5_Ant1_2480_0~Reference ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:55of83 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 Remark: Pretest9kHzto25GHz,findthehighestpointwhentesting,soonlytheworstdatawereshowninthetest report.PerFCCPart15.33(a)and15.31(o),Theamplitudeofspuriousemissionsfromintentionalradiators whichareattenuatedmorethan20dBbelowthepermissiblevalueneednotbereportedunlessspecifically requiredelsewhereinthispart. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:56of83 4.10 OtherrequirementsFrequencyHoppingSpreadSpectrumSystem TestRequirement:47CFRPart15CSection15.247(a)(1),(h)requirement: Thesystemshallhoptochannelfrequenciesthatareselectedatthesystemhopping ratefromaPseudorandomorderedlistofhoppingfrequencies.Eachfrequencymustbeusedequally ontheaveragebyeachtransmitter.Thesystemreceiversshallhaveinputbandwidthsthatmatchthe hoppingchannelbandwidthsoftheircorrespondingtransmittersandshallshiftfrequenciesin synchronizationwiththetransmittedsignals. Frequencyhoppingspreadspectrumsystemsarenotrequiredtoemployallavailablehopping channelsduringeachtransmission.However,thesystem,consistingofboththetransmitterandthe receiver,mustbedesignedtocomplywithalloftheregulationsinthissectionshouldthe transmitterbepresentedwithacontinuousdata(orinformation)stream.Inaddition,asystem employingshorttransmissionburstsmustcomplywiththedefinitionofafrequencyhoppingsystem andmustdistributeitstransmissionsovertheminimumnumberofhoppingchannelsspecifiedin thissection. Theincorporationofintelligencewithinafrequencyhoppingspreadspectrumsystemthatpermits thesystemtorecognizeotheruserswithinthespectrumbandsothatitindividuallyand independentlychoosesandadaptsitshopsetstoavoidhoppingonoccupiedchannelsispermitted. Thecoordinationoffrequencyhoppingsystemsinanyothermannerfortheexpresspurposeof avoidingthesimultaneousoccupancyofindividualhoppingfrequenciesbymultipletransmittersis notpermitted. Complianceforsection15.247(a)(1) AccordingtoBluetoothCoreSpecification,thepseudorandomsequencemaybegeneratedinanine- stageshiftregisterwhose5thand9thstage outputsareaddedinamodulo-twoadditionstage.Andtheresultisfedbacktotheinputofthefirst stage.ThesequencebeginswiththefirstONEof9consecutiveONEs;i.e.theshiftregisterisinitialized withnineones. •Numberofshiftregisterstages:9 •Lengthofpseudo-randomsequence:2 9 -1=511bits •Longestsequenceofzeros:8(non-invertedsignal) AnexampleofPseudorandomFrequencyHoppingSequenceasfollow: Eachfrequencyusedequallyontheaveragebyeachtransmitter. AccordingtoBluetoothCoreSpecification,BluetoothreceiversaredesignedtohaveinputandIF bandwidthsthatmatchthehoppingchannelbandwidthsofanyBluetoothtransmittersandshift frequenciesinsynchronizationwiththetransmittedsignals. Complianceforsection15.247(g) AccordingtoBluetoothCoreSpecification,theBluetoothsystemtransmitsthepacketwiththe pseudorandomhoppingfrequencywithacontinuousdataandtheshortbursttransmissionfromthe Bluetoothsystemisalsotransmittedunderthefrequencyhoppingsystemwiththepseudorandom hoppingfrequencysystem. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:57of83 Complianceforsection15.247(h) AccordingtoBluetoothCorespecification,theBluetoothsystemincorporateswithanadaptive systemtodetectotheruserwithinthespectrumbandsothatitindividuallyandindependentlyto avoidhoppingontheoccupiedchannels. AccordingtotheBluetoothCorespecification,theBluetoothsystemisdesignednothavetheability tocoordinatedwithotherFHSSSysteminanefforttoavoidthesimultaneousoccupancyofindividual hoppingfrequenciesbymultipletransmitter. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:58of83 4.11 RadiatedSpuriousEmission&Restrictedbands TestRequirement:47CFRPart15CSection15.209and15.205 TestMethod:ANSIC63.10:2013 TestSite:MeasurementDistance:3m(Semi-AnechoicChamber) ReceiverSetup: FrequencyDetectorRBWVBWRemark 0.009MHz-0.090MHzPeak10kHz30kHzPeak 0.009MHz-0.090MHzAverage10kHz30kHzAverage 0.090MHz-0.110MHzQuasi-peak10kHz30kHzQuasi-peak 0.110MHz-0.490MHzPeak10kHz30kHzPeak 0.110MHz-0.490MHzAverage10kHz30kHzAverage 0.490MHz-30MHzQuasi-peak10kHz30kHzQuasi-peak 30MHz-1GHzPeak120kHz300kHzPeak Above1GHz Peak1MHz3MHzPeak Peak1MHz10HzAverage Limit: Frequency Fieldstrength (microvolt/meter) Limit (dBuV/m) Remark Measurement distance(m) 0.009MHz-0.490MHz2400/F(kHz)--300 0.490MHz-1.705MHz24000/F(kHz)--30 1.705MHz-30MHz30--30 30MHz-88MHz10040.0Quasi-peak3 88MHz-216MHz15043.5Quasi-peak3 216MHz-960MHz20046.0Quasi-peak3 960MHz-1GHz50054.0Quasi-peak3 Above1GHz50054.0Average3 Note:15.35(b),Unlessotherwisespecified,thelimitonpeakradiofrequency emissionsis20dBabovethemaximumpermittedaverageemissionlimit applicabletotheequipmentundertest.Thispeaklimitappliestothetotal peakemissionlevelradiatedbythedevice. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20230500923E-01 Page:59of83 TestSetup: Figure1.Below30MHz Figure2.30MHzto1GHzFigure3.Above1GHz TestProcedure: a.1)Below1G:TheEUTwasplacedonthetopofarotatingtable0.8meters abovethegroundata3metersemi-anechoiccamber.Thetablewas rotated360degreestodeterminethepositionofthehighestradiation. 2)Above1G:TheEUTwasplacedonthetopofarotatingtable1.5meters abovethegroundata3metersemi-anechoiccamber.Thetablewas rotated360degreestodeterminethepositionofthehighestradiation. Note:Fortheradiatedemissiontestabove1GHz: PlacethemeasurementantennaawayfromeachareaoftheEUT determinedtobeasourceofemissionsatthespecifiedmeasurement distance,whilekeepingthemeasurem…

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TestPhotos 1.1 RadiatedEmission 9KHz~30MHz: 30MHz~1GHz: Above1GHz: 1.2 ConductedEmission