2BXQG-MT487Motorcycle audio

JianmenKorbrosCo.,Ltd CoveredEquipmentCertificationAttestationLetter 8/27/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa K1V1H2 Canada ATTN.:ReviewingEngineer FCCID:2BXQG-MT487 JianmenKorbrosCo.,Ltd(“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. JianmenKorbrosCo.,Ltd(“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredListasanentityproducing “covered”equipment. JianmenKorbrosCo.,Ltd(“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtdoesnotincludecybersecurityoranti-virussoftwareproducedor providedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees,including equipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsandassignees) cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446D01 CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:WeiqiuKe Title:CEO CompanyName:JianmenKorbrosCo.,Ltd Date:8/27/2026

JianmenKorbrosCo.,Ltd 8/27/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY-FCC FCCID:2BXQG-MT487 PursuanttoSections0.457(d)(1)(ii)and0.459oftheCommission’sRulesandFCCGuidance document726920,weherebyrequestconfidentialtreatmentofinformationaccompanyingthis applicationasoutlinedbelow: PERMANENTLONG-TERMCONFIDENTIALITY: Schematics BlockDiagrams TheoryofOperation Theaboveinformationcontainstradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthisinformationmightbeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors.TheApplicantunderstandsthatpursuanttoRule0.457(d)(1)(ii), disclosureofthisApplicationandallaccompanyingmaterialswillnotbemadebeforethedateofthe GrantforthisApplication. Sincerely, Signed: Printedname:WeiqiuKe Title:CEO

JiangmenKorbrosCo.,Ltd ProductSimilarityDeclaration Productname:Motorcycleaudio Modelname:MT487,T487 FCCID:2BXQG-MT487 We(JiangmenKorbrosCo.,Ltd)herebystatethatallthemodelsareelectrical identicalincludingthesamesoftwareparameterandhardwaredesign(i.e., circuitdesign,PCBLayout,RFmodule/circuit,antennatype(s)andantenna location,componentsonPCB,etc.,),samemechanicalstructureanddesign (includingproductenclosure,materials,etc.,),onlythesalesmarket,only differencesinappearanceandcolor,doesnotcontainmetallicpaint. Signature: Printedname:WeiqiuKe Title:CEO

FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487

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FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487 FCCID:2BXQG-MT487

Page 1 of 2 RF EXPOSURE EVALUATION FCC ID: 2BXQG-MT487 Product Name : Motorcycle audio Model Name : MT487,T487 Brand : purevox/korbros/aoveise/purevox audio Bluetooth Version : BT BDR+EDR Operating frequency : 2402-2480MHz Numbers of Channel : 79 channels for BDR+EDR Antenna Type : PCB antenna Antenna Gain : 1.9 dBi Type of Modulation : GFSK, Π/4-DQPSK,8DPSK For DSS Power supply : Input: 12V⎓10A Hardware Version : N/A Software Version : N/A Page 2 of 2 Standard Requirement According to § 15.247(i) and § 1.1307b(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy levels in excess of the Commission’s guidelines. See KDB 447498 D01 General RF Exposure Guidance v06, section 4. 3. 1. The 1-g and 10-g SAR test exclusion thresholds for 100MHz to 6GHz at test separation distances ≤ 50mm are determined by: [ (max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]*[ √f(GHz)] ≤3.0 for 1-g SAR and ≤7.5 for 10-g SAR extremity SAR, where ⚫ f(GHz) is the RF channel transmit frequency in GHz ⚫ Power and distance are rounded to the nearest mW and mm before calculation ⚫ The result is rounded to one decimal place for comparison. The test exclusions are applicable only when the minimum test separation distance is ≤ 50mm and for transmission frequencies between 100MHz and 6GHz. When the minimum test separation distance is <5mm, a distance of 5mm is applied to determine SAR test exclusion. Routine SAR evaluation refers to that specifically required by § 2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to quality for TCB approval. Channel (MHz) Maximum output power (dBm) Tune up tolerance (dBm) Max Tune Up Power (mW) Distance (mm) Calculation results Limit Operating Mode 2441 5.79 5.79±1 4.775293 5 1.492155 3 2DH5 According to KDB 447498, The device only support BT function, and no simultaneous SAR measurement is required. Signature Simon Pu Manager Date: 2026-08-06

Report No.: PTC26060317904E-FC01 Page 1 of 86 FCC TEST REPORT FCC ID: 2BXQG-MT487 Product : Motorcycle audio Model Name : MT487,T487 Brand : purevox/korbros/aoveise/purevox audio Report No. : PTC26060317904E-FC01 Prepared for Jianmen Korbros Co., Ltd Room 4, Building A1, Installation Workshop, No. 11 Huoli Road, Jianghai District, Jiangmen City 529000 Prepared by Precise Testing & Certification Co., Ltd. Building 1, No. 6, Tongxin Road, Dongcheng Street, Dongguan, Guangdong, China Report No.: PTC26060317904E-FC01 Page 2 of 86 1 TEST RESULT CERTIFICATION Applicant’s name : Jianmen Korbros Co., Ltd Address : Room 4, Building A1, Installation Workshop, No. 11 Huoli Road, Jianghai District, Jiangmen City 529000 Manufacture's name : Jianmen Korbros Co., Ltd Address : Room 4, Building A1, Installation Workshop, No. 11 Huoli Road, Jianghai District, Jiangmen City 529000 Product name : Motorcycle audio Model name : MT487,T487 Standards : FCC CFR47 Part 15 Section 15.247 Test procedure : ANSI C63.10-2020 Test Date : Jun. 25, 2026 to Aug. 06, 2026 Date of Issue : Aug. 06, 2026 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.: PTC26060317904E-FC01 Page 3 of 86 Contents Page 1 TEST RESULT CERTIFICATION .............................................................................................................................. 2 2 TEST SUMMARY ......................................................................................................................................................... 5 3 TEST FACILITY ............................................................................................................................................................ 5 4 GENERAL INFORMATION ........................................................................................................................................ 6 4.1 GENERAL DESCRIPTION OF E.U.T. .................................................................................................................... 6 4.2 TEST MODE ........................................................................................................................................................ 7 5 EQUIPMENT DURING TEST ..................................................................................................................................... 9 5.1 EQUIPMENTS LIST............................................................................................................................................... 9 5.2 MEASUREMENT UNCERTAINTY ......................................................................................................................... 11 5.3 DESCRIPTION OF SUPPORT UNITS ................................................................................................................... 12 6 CONDUCTED EMISSION ......................................................................................................................................... 13 6.1 E.U.T. OPERATION ........................................................................................................................................... 13 6.2 EUT SETUP ...................................................................................................................................................... 13 6.3 TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................................. 14 6.4 MEASUREMENT PROCEDURE: .......................................................................................................................... 14 6.5 CONDUCTED EMISSION LIMIT ........................................................................................................................... 14 6.6 MEASUREMENT DESCRIPTION .......................................................................................................................... 14 6.7 CONDUCTED EMISSION TEST RESULT ............................................................................................................. 14 7 RADIATED SPURIOUS EMISSIONS ..................................................................................................................... 15 7.1 EUT OPERATION .............................................................................................................................................. 15 7.2 TEST SETUP ..................................................................................................................................................... 16 7.3 SPECTRUM ANALYZER SETUP .......................................................................................................................... 17 7.4 TEST PROCEDURE ............................................................................................................................................ 18 7.5 SUMMARY OF TEST RESULTS .......................................................................................................................... 19 8 MAXIMUM PEAK OUTPUT POWER TEST .......................................................................................................... 26 8.1 TEST STANDARD AND LIMIT .............................................................................................................................. 26 8.2 TEST SETUP ..................................................................................................................................................... 26 8.3 TEST PROCEDURE .................................................…

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FCCID:2BXQG-MT487 CONDUCTEDEMISSIONTEST RadiatedSpuriousEmissions From30MHz-1000MHz FCCID:2BXQG-MT487 TestfrequencyfromAbove1GHz