2BBNW-JM28wireless headphones

LocalRepresentativeLetter For CertificationServicein the USA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD 21048 To whomit may concern Pursuantto Section2.911(d)(7),of the Commission’s Rules(47 C.F.R.)we attestas followsfor the productlistedbelow: FCC IDModelname 2BBNW-JM28JM28 We herebyacknowledgeas follows: i. bothsigneesconfirmthat the pointof contactacceptsresponsibilityto act as a US- AmericanRepresentativeon behalfof the applicant ii.the pointof contactprovidesthe physicalU.S. addressand emailas listedbelow iii.bothpartiesmaintainthe requirementsof this agreementfor no less thanone year afterthe granteehas terminatedall marketingand importationor the conclusionof any Commission-relatedproceedinginvolvingthe equipment. iv.An expirationdatefor this letterdoesnot exist.In case the U.S. agentchanges,the granteeis obligatedto notifythe FCC within30 daysvia the grantingTCB. US-AmericanPointof ContactApplicant/ApprovalHolder SignatureDate:2026-05-27SignatureDate:2026-05-27 CompanyName:GLOCERTSTECHNOLOGYINCShenzhenXintuCentury TechnologyCo., Ltd. FRN:00363397370033884602 ContactName:HuiyingFanZhiPengCai Address:19784SUNKISSEDRIDGEDR, RIVERSIDE,CA 92507 No. 5/FA,BuildingA1, Anle IndustrialZone,172 Hangcheng Avenue,HangchengStreet,Baoan District,Shenzhen,China Phone:(626)588-803913713727600 Email:[email protected]@qq.com

FCC ID: 2BBNW-JM28

TheEUTissosmallthatnospareplaceforFCCID,butyoucanfinditonthePackageandinthe Usermanual. 1.FCCIDonthePackage: 2.FCCIDintheusermanual:

FCC ID: 2BBNW-JM28 Antenna Antenna

RFEXPOSUREEVALUATION FCCID:2BBNW-JM28 Product:wirelessheadphones ModelName:JM28 Brand: N/A ReportNo.:PTC26041512902E-FC02 Preparedfor ShenzhenXintuCenturyTechnologyCo.,Ltd. No.5/FA,BuildingA1,AnleIndustrialZone,172HangchengAvenue,HangchengStreet,Baoan District,Shenzhen,China Preparedby PreciseTesting&CertificationCo.,Ltd. Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong,China ReportNo.:PTC26041512902E-FC02 Page2of5 GeneralInformation ProductName:wirelessheadphones ModelName:JM28 Specification: BluetoothBDR+EDR OperationFrequency: 2400-2480MHzforBT NumberofChannel:79channelsforBDR+EDR TypeofModulation:GFSK,Π/4-DQPSK,8DPSKForDSS Antennainstallation:ChipAntenna AntennaGain:2.7dBi Powersupply:DC3.7V,30mAhlithiumbattery HardwareVersion:6 SoftwareVersion:6 TestsampleNo.:PTC26041512902E-1/2,PTC26041512902E-2/2. TestDate :Apr.23,2026toMay13,2026 ReportNo.:PTC26041512902E-FC02 Page3of5 TESTFACILITY PreciseTesting&CertificationCo.,Ltd Address:Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong, China FCCRegistrationNumber:790290 A2LACertificateNo.:4408.01 ICRegistrationNumber:12191A FCCDesignationNumber:CN1219 ReportNo.:PTC26041512902E-FC02 Page4of5 StandardRequirement Accordingto§15.247(i)and§1.1307b(1),systemsoperatingundertheprovisionsofthis sectionshallbeoperatedinamannerthatensuresthatthepublicisnotexposedtoradio frequencyenergylevelsinexcessoftheCommission’sguidelines.SeeKDB447498D01 GeneralRFExposureGuidancev06,section4.3.1. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances≤50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]*[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gSARextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison. Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤ 50mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion. RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,usingmeasurements orcomputersimulation.WhenroutineSARevaluationisnotrequired,portabletransmitters withoutputpowergreaterthantheapplicablelowthresholdrequireSARevaluationtoquality forTCBapproval. ReportNo.:PTC26041512902E-FC02 Page5of5 RFOutputpower Mode Maximum output power (dBm) Tuneup tolerance (dBm) MaxTune UpPower (mW) Distance (mm) Calculation results Limit Operating Mode 2480MHz1.86 1.86±1 1.932 5 0.6083 Bluetooth Conclusion: 1.Calculateintheworst-casemode. 2.Max.TuneUpPowerisdeclaredbymanufacturer,andusedtocalculate.

FCC TEST REPORT FCC ID: 2BBNW-JM28 Product: wireless headphones Model Name : JM28 Brand: N/A Report No.: PTC26041512902E-FC01 Prepared for Shenzhen Xintu Century Technology Co., Ltd. No. 5/FA, Building A1, Anle Industrial Zone, 172 HangchengAvenue, Hangcheng Street, Baoan District, Shenzhen, China Prepared by Precise Testing & Certification Co., Ltd. Building 1, No. 6, Tongxin Road, Dongcheng Street, Dongguan, Guangdong, China Report No.: PTC26041512902E-FC01 Page 2 of 81 1 TEST RESULT CERTIFICATION Applicant’s name : Shenzhen Xintu Century Technology Co., Ltd. Address: No. 5/FA, Building A1, Anle Industrial Zone, 172 HangchengAvenue, Hangcheng Street, Baoan District, Shenzhen, China Manufacture's name : Shenzhen Xintu Century Technology Co., Ltd. Address: No. 5/FA, Building A1, Anle Industrial Zone, 172 HangchengAvenue, Hangcheng Street, Baoan District, Shenzhen, China Product name: wireless headphones Model name: JM28 Standards: FCC CFR47 Part 15 Section 15.247 Test procedure: ANSI C63.10-2020 Test Date: Apr. 23, 2026 to May 13, 2026 Date of Issue: May 13, 2026 Test Result: Pass This device described above has been tested by PTC, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of PTC, this document may be altered or revised by PTC, personal only, and shall be noted in the revision of the document. Test Engineer: Jack zhou / Engineer Technical Manager: Simon Pu / Manager Report No.: PTC26041512902E-FC01 Page 3 of 81 Contents Page 1 TEST RESULT CERTIFICATION...............................................................................................................................2 2 TEST SUMMARY..........................................................................................................................................................5 NOTE ： THE EUT ARE TWO SAME HEADPHONES, ONLY ONE OF THEM WAS TESTED AND RECORDED IN THIS REPORT......................................................................................................................................5 3 TEST FACILITY.............................................................................................................................................................5 4 GENERAL INFORMATION..........................................................................................................................................6 4.1 G ENERAL D ESCRIPTION OF E.U.T.....................................................................................................................6 4.2 T EST M ODE .........................................................................................................................................................7 5 EQUIPMENT DURING TEST......................................................................................................................................9 5.1 E QUIPMENTS L IST ...............................................................................................................................................9 5.2 M EASUREMENT U NCERTAINTY .........................................................................................................................11 5.3 D ESCRIPTION OF S UPPORT U NITS ...................................................................................................................12 6 CONDUCTED EMISSION..........................................................................................................................................13 6.1 E.U.T. O PERATION ............................................................................................................................................13 6.2 EUT S ETUP .......................................................................................................................................................13 6.3 T EST SET-UP (B LOCK D IAGRAM OF C ONFIGURATION ).................................................................................14 6.4 M EASUREMENT P ROCEDURE :...........................................................................................................................14 6.5 C ONDUCTED E MISSION L IMIT ...........................................................................................................................14 6.6 M EASUREMENT D ESCRIPTION ..........................................................................................................................14 6.7 C ONDUCTED E MISSION T EST R ESULT .............................................................................................................14 7 RADIATED SPURIOUS EMISSIONS......................................................................................................................17 7.1 EUT O PERATION ...............................................................................................................................................17 7.2 T EST S ETUP ......................................................................................................................................................18 7.3 S PECTRUM A NALYZER S ETUP ..........................................................................................................................19 7.4 T EST P ROCEDURE .............................................................................................................................................20 7.5 S UMMARY OF T EST R ESULTS ...........................................................................................................................21 8 MAXIMUM PEAK OUTPUT POWER TEST............................................................................................................28 8.1 T EST S TANDARD AND L IMIT ...............................................................................................…

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Report No.: PTC26041512902E-FC01 Page 64 of 81 3DH5-Ant1-2402-PASS 3DH5-Ant1-2480-PASS Report No.: PTC26041512902E-FC01 Page 65 of 81 3DH5-Ant1-Hop_2402-PASS 3DH5-Ant1-Hop_2480-PASS Report No.: PTC26041512902E-FC01 Page 66 of 81 Conducted Emission Method Test Result TestModeAntennaFrequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5Ant124020~Reference-2.22-2.22---PASS DH5Ant1240230~1000-2.22-59.21≤-22.22PASS DH5Ant124021000~26500-2.22-39.27≤-22.22PASS DH5Ant124410~Reference-1.55-1.55---PASS DH5Ant1244130~1000-1.55-58.71≤-21.55PASS DH5Ant124411000~26500-1.55-35.87≤-21.55PASS DH5Ant124800~Reference-1.04-1.04---PASS DH5Ant1248030~1000-1.04-59.95≤-21.04PASS DH5Ant124801000~26500-1.04-34.15≤-21.04PASS 2DH5Ant124020~Reference-6.51-6.51---PASS 2DH5Ant1240230~1000-6.51-57.96≤-26.51PASS 2DH5Ant124021000~26500-6.51-38.63≤-26.51PASS 2DH5Ant124410~Reference-5.49-5.49---PASS 2DH5Ant1244130~1000-5.49-59.05≤-25.49PASS 2DH5Ant124411000~26500-5.49-34.99≤-25.49PASS 2DH5Ant124800~Reference-4.62-4.62---PASS 2DH5Ant1248030~1000-4.62-59.1≤-24.62PASS 2DH5Ant124801000~26500-4.62-38.81≤-24.62PASS 3DH5Ant124020~Reference-5.67-5.67---PASS 3DH5Ant1240230~1000-5.67-59.46≤-25.67PASS 3DH5Ant124021000~26500-5.67-41.87≤-25.67PASS 3DH5Ant124410~Reference-4.14-4.14---PASS 3DH5Ant1244130~1000-4.14-59.76≤-24.14PASS 3DH5Ant124411000~26500-4.14-35.26≤-24.14PASS 3DH5Ant124800~Reference-0.38-0.38---PASS 3DH5Ant1248030~1000-0.38-59.68≤-20.38PASS 3DH5Ant124801000~26500-0.38-38.98≤-20.38PASS Report No.: PTC26041512902E-FC01 Page 67 of 81 Test Graphs: DH5-Ant1-2402-0~Reference-PASS DH5-Ant1-2402-30~1000-PASS Report No.: PTC26041512902E-FC01 Page 68 of 81 DH5-Ant1-2402-1000~26500-PASS DH5-Ant1-2441-0~Reference-PASS Report No.: PTC26041512902E-FC01 Page 69 of 81 DH5-Ant1-2441-30~1000-PASS DH5-Ant1-2441-1000~26500-PASS Report No.: PTC26041512902E-FC01 Page 70 of 81 DH5-Ant1-2480-0~Reference-PASS DH5-Ant1-2480-30~1000-PASS Report No.: PTC26041512902E-FC01 Page 71 of 81 DH5-Ant1-2480-1000~26500-PASS 2DH5-Ant1-2402-0~Reference-PASS Report No.: PTC26041512902E-FC01 Page 72 of 81 2DH5-Ant1-2402-30~1000-PASS 2DH5-Ant1-2402-1000~26500-PASS Report No.: PTC26041512902E-FC01 Page 73 of 81 2DH5-Ant1-2441-0~Reference-PASS 2DH5-Ant1-2441-30~1000-PASS Report No.: PTC26041512902E-FC01 Page 74 of 81 2DH5-Ant1-2441-1000~26500-PASS 2DH5-Ant1-2480-0~Reference-PASS Report No.: PTC26041512902E-FC01 Page 75 of 81 2DH5-Ant1-2480-30~1000-PASS 2DH5-Ant1-2480-1000~26500-PASS Report No.: PTC26041512902E-FC01 Page 76 of 81 3DH5-Ant1-2402-0~Reference-PASS 3DH5-Ant1-2402-30~1000-PASS Report No.: PTC26041512902E-FC01 Page 77 of 81 3DH5-Ant1-2402-1000~26500-PASS 3DH5-Ant1-2441-0~Reference-PASS Report No.: PTC26041512902E-FC01 Page 78 of 81 3DH5-Ant1-2441-30~1000-PASS 3DH5-Ant1-2441-1000~26500-PASS Report No.: PTC26041512902E-FC01 Page 79 of 81 3DH5-Ant1-2480-0~Reference-PASS 3DH5-Ant1-2480-30~1000-PASS Report No.: PTC26041512902E-FC01 Page 80 of 81 3DH5-Ant1-2480-1000~26500-PASS Report No.: PTC26041512902E-FC01 Page 81 of 81 14 Antenna Requirement 14.1 Test Standard and Requirement Test Standard FCC Part15 Section 15.203 /247(c) Requirement 1) 15.203 requirement: An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator, the manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited. 2) 15.247(c) (1)(i) requirement: Systems operating in the 2400-2483.5 MHz band that is used exclusively for fixed. Point-to-point operations may employ transmitting antennas with directional gain greater than 6dBi provided the maximum conducted output power of the intentional radiator is reduced by 1 dB for every 3 dB that the directional gain of the antenna exceeds 6 dBi. 14.2 Antenna Connected Construction The antenna is Chip Antenna which permanently attached, and the best case gain of the antenna is 2.7 dBi. It complies with the standard requirement. ******THE END REPORT******

2.4GHz 2012 Chip Antenna: RANT2012F245X07 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 RANT2012F245X07 (A)(B)(C)(D)(E)(F) (A)ProductTypeChipAntenna (B)SizeCode2.0x1.2mm(+-0.2mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=07 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84(Min.) PeakGain2.7 dBi (Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) ThespecificationisdefinedonEVB. DimensionandTerminalConfiguration 咏成國際科技有限公司電話 :13530576606 RAINInternationalTechnologyCo.,Ltd. 7/F,BuildingF,ZhichuangPark,Tong'an,Gushu,Shenzhen 2.4GHz 2012 Chip Antenna: RANT2012F245X07 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 2400MHz2500MH 2450MHz z Efficiency70.56%75.25%71.01% 2.4GHz 2012 Chip Antenna: RANT2012F245X07 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 ReliabilityTabl 2.4GHz 2012 Chip Antenna: RANT2012F245X07 e 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 2.4GHz 2012 Chip Antenna: RANT2012F245X 2.4GHz 2012 Chip Antenna: RANT2012F245X07 07 _ 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 1NewDatashee2022/10/15t

ConductedEmission RadiatedEmissions From 30M-1GHz FCC ID: 2BBNW-JM28 Above1GHz RFconducted