2AXWI-R72ULTRA2.4G Wireless Mouse

5-LinkTechnologyCo.,Ltd. Date:7January2026 To:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Attestation Section2.911(d)(5)(i)andSection2.911(d)(5)(ii) (KDB986446D01CoveredEquipment) Section2.911(d)(5)(i) 5-LinkTechnologyCo.,Ltd.(“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Thesoftwaretobeloadedpriortomarketingoftheequipmentidentifiedbelowisnot "covered"softwaremanufacturedbyanyentityincludingpredecessors,successors, parents,subsidiaries,oraffiliatesoranyentitywhichhasrebrandedorrelabeledthe softwareproducedbytheentity(ies)identifiedonthe"CoveredList"DA24-886and KDB986446D01CoveredEquipmentGuidancesectionB(2a). 5-LinkTechnologyCo.,Ltd.(“theapplicant”)furthercertifiesthatnoCybersecurity oranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc.oranyofits successorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc. (oranyofitssuccessorsandassignees)cybersecurityoranti-virussoftwareis installedintheequipmentbeingcertified. Section2.911(d)(5)(ii) 5-LinkTechnologyCo.,Ltd.(“theapplicant”)certifiesthat,asofthedateofthefiling oftheapplication,theapplicant[isnot]identifiedontheCoveredList(asa specificallynamedentityoranyofitssubsidiariesoraffiliates)asanentityproducing “covered”equipment. TypeofEquipmentsubjecttoFCCCertification:FCCID:2AXWI-R72ULTRA Ifyouhaveanyquestions,pleasefeelfreetocontactme ContactPerson:CherryLin PositionintheCompany:Projectmanager DateofSignature: ___________________________ Signatory (signatureoftheapplicant)

[5-LinkTechnologyCo.,Ltd.] Rev1/26/2023 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:7-Jan-26 Ref:AttestationStatementsPart2.911(d)(7)Filing FCCID:2AXWI-R72ULTRA FRN：0030107510 5-LinkTechnologyCo.,Ltd.(“theapplicant”)certifiesthat,asofthedateofthefilingoftheapplication, A4TECHUSACorporationisourdesignatedU.S.agentforserviceofprocessfortheabovereferenced FCCID.5-LinkTechnologyCo.,Ltd.acceptstomaintainanagentfornolessthanoneyearafterthe granteehasterminatedallmarketingandimportationortheconclusionofanyCommission-related proceedinginvolvingtheequipment. A4TECHUSACorporationaccepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:A4TECHUSACorporation FRN：0034574376 Address:3929SchaeferAve,ChinoCA,91710,USA ContactPerson:BILLHSU Tel.:909-628-8858 Email:[email protected] Sincerely, 5-LinkTechnologyCo.,Ltd.A4TECHUSACorporation CherryLin BILLHSU

Date:7January2026 5-LinkTechnologyCo.,Ltd. To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 ToWhomItMayConcern: The5-LinkTechnologyCo.,Ltd.theundersigned,herebyauthorizesMr.WuXuewenfrom ShenzhenBALUNTechnologyCo.,Ltd.,toactonthebehalfofthe5-LinkTechnologyCo.,Ltd. solelyinmattersrelatingtotheapplicationforanFCCequipmentauthorizationforFCCID: 2AXWI-R72ULTRAincludingthesigningofdocumentsinconnectionwiththisApplication. NecessaryactscarriedoutbyShenzhenBALUNTechnologyCo.,Ltd.inconnectionwiththe Applicationshallhavethesameeffectasactsofthe5-LinkTechnologyCo.,Ltd. The5-LinkTechnologyCo.,Ltd.alsoherebycertifythatnopartytothisapplicationissubjectto adenialofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuse Actof1988,21U.S.C.Section862. YoursSincerely, CherryLin

Date:7January2026 5-LinkTechnologyCo.,Ltd. To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 Re:5-LinkTechnologyCo.,Ltd. FCCID:2AXWI-R72ULTRA FCCCertificationConfidentialityRequest Gentlemen: Thisletteristocomplywith47CFR0.457and0.459pertainingtoconfidentiality material.5-LinkTechnologyCo.,Ltd.requeststhatthefollowingdocuments regardingthissubmissionforFCCID:2AXWI-R72ULTRAbekeptconfidential: ExhibitTypeFileName BlockDiagramBlockDiagram.pdf SchematicsSchematics.pdf OperationalDescriptionOperationalDescription.pdf Andbelowexhibitkeptshort-termconfidential(180days): ExternalphotosExternalphotos.pdf Testsetupphotostestphoto.pdf InternalphotosInternalphotos.pdf UsermanualUsermanual.pdf Thosedocumentscontaindetailedsystemandequipmentdescriptionandrelated informationabouttheproductwhich5-LinkTechnologyCo.,Ltd..considerstobe confidentialproprietary,acustomdesignand,otherwise,notreleasabletothe generalpublic.Sincethisdesignisabasisformwhichfuturetechnological productswillevolve,5-LinkTechnologyCo.,Ltd.considersthisinformationwould beofbenefittoitscompetitors,andthatthedisclosureoftheinformationinthese documentswouldgivecompetitorsanunfairadvantageinthemarket. YoursSincerely, CherryLin

M o d e l : R 7 2 U l ra R e c e i v e r M o d e l : M N - 60 D O F F O N C III O p e r a t i n g 3 . 7 V = 30 m A M a d e i n C h i n a F C C I D : 2 A X W I - R 72 U L TR A

Report No.: BL-SZ25C0062-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: 5-Link Technology Co., Ltd. Address: Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China Equipment Type: 2.4G Wireless Mouse Model Name: R72 Ultra (refer to section 2.3) Brand Name: A4TECH, Fstyler, Bloody FCC ID: 2AXWI-R72ULTRA Test Standard: 47 CFR Part 2.1093 KDB 447498 D04 v01 Sample Arrival Date: Nov. 28, 2025 Test Date: Dec. 31, 2025 Date of Issue: Jan. 07, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ25C0062-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Content Rev. 01 Jan. 07, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ......................................................................................................... 3 1.1 Test Laboratory .............................................................................................................. 3 1.2 Test Location .................................................................................................................. 3 2 PRODUCT INFORMATION ......................................................................................................... 4 2.1 Applicant Information ...................................................................................................... 4 2.2 Manufacturer Information ............................................................................................... 4 2.3 General Description for Equipment under Test (EUT) ................................................... 4 2.4 Technical Information ..................................................................................................... 4 3 SUMMARY OF TEST RESULT ................................................................................................... 5 3.1 Test Standards ............................................................................................................... 5 4 DEVICE CATEGORY AND LEVELS LIMITS .............................................................................. 6 5 ASSESSMENT RESULT ............................................................................................................. 8 5.1 Output Power ................................................................................................................. 8 5.2 Tune-up power ............................................................................................................... 8 5.3 RF Exposure Evaluation Result ..................................................................................... 8 5.4 Conclusion ...................................................................................................................... 8 Report No.: BL-SZ25C0062-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1/F, Building B, Ganghongji High-tech Intelligent Industrial Park, No. 1008, Songbai Road, Yangguang Community, Xili Sub-district, Nanshan District, Shenzhen, Guangdong Province, P. R. China Accreditation Certificate The laboratory is a testing organization accredited by FCC as a accredited testing laboratory. The designation number is CN1196. Report No.: BL-SZ25C0062-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 9 Web: www.titcgroup.com Template No.: TRP-FCC-Portable-2 (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant 5-Link Technology Co., Ltd. Address Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China 2.2 Manufacturer Information Manufacturer 5-Link Technology Co., Ltd. Address Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China 2.3 General Description for Equipment under Test (EUT) EUT Name 2.4G Wireless Mouse Model Name Under Test R72 Ultra Series Model Name R72Q Ultra, R72 Ultra Duo, R72 Ultra Dock Description of Model name differentiation All models are same with electrical parameters and internal circuit structure, but only differ in model name. (this information provided by the applicant) Hardware Version R72BUltra-CE-PAR2862-P3313-M VER:02 Software Version R72B3_Ultra+P3313 Dimensions (Approx.) N/A Weight (Approx.) N/A 2.4 Technical Information Network and Wireless connectivity 2.4G ISM Band The requirement for the following technical information of the EUT was tested in this report: Operating Mode 2.4G ISM Band Frequency Range 2.4G ISM Band 2405 ~ 2476 MHz Antenna Type 2.4G ISM Band PCB Antenna Exposure Category General Population/Uncontrolled Exposure Product Type Portable Device Report No.: BL-SZ25C0062-701 Tel: +86-755-66850100 E-mail: …

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Report No.: BL-SZ25C0062-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 58 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: 5-Link Technology Co., Ltd. Address: Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China Equipment Type: 2.4G Wireless Mouse Model Name: R72 Ultra (refer to section 2.3) Brand Name: A4TECH, Fstyler, Bloody FCC ID: 2AXWI-R72ULTRA Test Standard: 47 CFR Part 15 Subpart C (refer to section 3.1) Sample Arrival Date: Nov. 28, 2025 Test Date: Dec. 10, 2025 - Dec. 29, 2025 Date of Issue: Jan. 07, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Yang Wenxuan Checked by: Ye Hongji Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ25C0062-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 58 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Rev. 01 Jan. 07, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ......................................................................................................... 4 1.1 Test Laboratory .............................................................................................................. 4 1.2 Test Location .................................................................................................................. 4 2 PRODUCT INFORMATION ......................................................................................................... 5 2.1 Applicant Information ...................................................................................................... 5 2.2 Manufacturer Information ............................................................................................... 5 2.3 General Description for Equipment under Test (EUT) ................................................... 5 2.4 Technical Information ..................................................................................................... 6 3 SUMMARY OF TEST RESULTS ................................................................................................. 7 3.1 Test Standards ............................................................................................................... 7 3.2 Verdict ............................................................................................................................ 7 4 GENERAL TEST CONFIGURATIONS ........................................................................................ 8 4.1 Test Environments ......................................................................................................... 8 4.2 Test Equipment List ........................................................................................................ 8 4.3 Test Software List ........................................................................................................... 9 4.4 Measurement Uncertainty .............................................................................................. 9 4.5 Description of Test Setup ............................................................................................... 9 4.6 Measurement Results Explanation Example ................................................................ 12 5 TEST ITEMS .............................................................................................................................. 13 5.1 Antenna Requirements ................................................................................................. 13 5.2 Output Power ............................................................................................................... 14 5.3 Occupied Bandwidth .................................................................................................... 16 5.4 Conducted Spurious Emission ..................................................................................... 17 5.5 Band Edge (Authorized-band band-edge) .................................................................... 19 Report No.: BL-SZ25C0062-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 58 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 5.6 Conducted Emission .................................................................................................... 21 5.7 Radiated Spurious Emission ........................................................................................ 22 5.8 Band Edge (Restricted-band band-edge) ..................................................................... 27 5.9 Power Spectral density (PSD) ...................................................................................... 28 ANNEX A TEST RESULT ............................................................................................................. 29 A.1 Output Power ............................................................................................................... 29 A.2 Occupied Bandwidth .................................................................................................... 32 A.3 Conducted Spurious Emissions ................................................................................... 36 A.4 Band Edge (Authorized-band band-edge) .................................................................... 41 A.5 Conducted Emissions ................................................................................................... 44 A.6 Radiated Spurious Emission ...................................................…

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R72 Ultra Antenna specification 1.Antenna introduction The 2.4G module antenna is directly used on the PCB. Manufacturer: Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China 2.Antenna shape 3.Specifications Dimensions(mm) 40.2(L)x 0.8(W) Thickness 0.8mm Material Copper Gold 4.Antenna parameter The 2.4G antenna operates at 2405-2476MHz and generates resonance in thisband. The table below shows the main parameters of the antenna. Frequency 2405-2476MHz VSWR ≤2.0 Impedance 50ohm Return loss -10dB Max Radiation Omni-directional Gain (Peak) 0.55dBi Polarization Linear, Vertical Admitted Power 1mW 5.Antenna horizontal test gain report Direction map: 6. Antenna vertical test gain report Direction map: