2AMSUGMAERGWBT18WLLefthand Ergonomics Wireless Mouse 2.4G&Bluetooth

SANWA LIMITED Covered Equipment Certification Attestation Letter 2/24/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AMSUGMAERGWBT18WL SANWA LIMITED (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. SANWA LIMITED (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. SANWA LIMITED (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed Name: Yuzo Yamada Title: Manager Company Name: SANWA LIMITED Date: 02/24/2026

SANWA LIMITED * the applicant must designate a contact located in the United States for purposes of acting as the appl icant’s agent for service of process, regardless of whether the applicant is a domestic or forei gn ent ity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 2/24/2026 TO: Feder al Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2AMSUGMAERGWBT18WL FRN of applicant: 0026661330 Per section 2.911(d)(7) of the FCC rules, [SANWA LIMITED] (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: C ompany Name: FCC US Agent, LLC FCC Registration Number (FRN): 0033402884 Physical U.S. Company Address: 3722 Illinois Avenue, Saint Charles, IL 60174, USA Contact Person: Tim Payne Agent Email Address: [email protected] The abov e contact person accepts the obligation for service of process. The appl icant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. A pplicant Signed: Agent Signed (if different from Applicant): Signed: Printed name: Sal Hamra Title: Manager Company Name: SANWA LIMITED Date: 2/24/2026 S igned: Printed name: Tim Payne Title: Manager Company Name: FCC US Agent, LLC Date: 2/24/2026

DATE: 02/24/2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen EU Testing Laboratory Limited (101, Building B1, Fuqiao Fourth Area, Qiaotou Community Fuhai Subdistrict Baoan District,Shenzhen,China) (Name of Agent company name and address) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with SANWA LIMITED (Room 1005, 10/F, Tower 2, Silvercord 30 Canton Road, Tsim Sha Tsui, Kowloon Hong Kong China ) (Applicant Name and address) Signed: Printed Name: Yuzo Yamada Title: Manager Company Name: SANWA LIMITED Date: 02/24/2026

Date 02/24/2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). Sincerely, Signed: Printed Name: Yuzo Yamada Title: Manager Company Name: SANWA LIMITED Date: 02/24/2026

DATE 02/24/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: ___ 2AMSUGMAERGWBT18WL ______ Product Name: ___ Lefthand Ergonomics Wireless Mouse 2.4G&Bluetooth___ Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...) • Schematics • Block diagram • Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Signed: Printed Name: Yuzo Yamada Title: Manager Company Name: SANWA LIMITED Date: 02/24/2026

DATE : 02/24/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AMSUGMAERGWBT18WL Product Name: Lefthand Ergonomics Wireless Mouse 2.4G&Bluetooth Request for Short-Term Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission rules, and in accordance with the FCC Public notice dated June 15, 2004 (DA 04-1705), we hereby request short-term confidentiality for the following items prior to marketing the device.:  Test Setup Photos  External Photos  Internal Photos  User Manual The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Signed: Printed Name: Yuzo Yamada Title: Manager Company Name: SANWA LIMITED Date: 02/24/2026

SANWA LIMITED Declaration on Model Differences We, SANWA LIMITED Room 1005, 10/F, Tower 2, Silvercord 30 Canton Road, Tsim Sha Tsui, Kowloon Hong Kong China Declare that the following product(s): Product Name: Lefthand Ergonomics Wireless Mouse 2.4G&Bluetooth Model No.: GMAERGWBT18WL, GMAERGWBT18BKL FCC ID: 2AMSUGMAERGWBT18WL All models are same with electrical parameters and internal circuit structure, but only differ in appearance color and model name. Therefore, the (GMAERGWBT18WL) model will be the primary test model. The manufacturer would take all the responsibilities for the above product(s). For and on behalf of Kowloon Hong Kong China Authorized person Location Name: Yuzo Yamada Position: Manager Date of issue: 2026-02-24 *I hereby declare that I am entitled to sign on behalf of the applicant and that the information supplied is correct and complete.

Label Location Label Size: 15*30mm

RF EXPOSURE EVALUATION FCC ID: 2AMSUGMAERGWBT18WL According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in KDB 447498 D01: 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 qualify for TCB approval. BLE+2.4G: Channel (MHz) Maximum output power (dBm) Tune up tolerance (dBm) Max Tune Up Power (dBm) Distance (mm) Calculation results Limit Operating Mode 2402 -1.72 -1.72±1 -0.72 5 0.263 3 1M 2441 -1.40 -1.40±1 -0.40 5 0.285 3 2480 -1.73 -1.73±1 -0.73 5 0.266 3 2402 -1.68 -1.68±1 -0.68 5 0.265 3 2M 2441 -1.22 -1.22±1 -0.22 5 0.297 3 2480 -1.71 -1.71±1 -0.71 5 0.267 3 2403 0.30 0.30±1 1.30 5 0.418 3 2.4G 2441 0.06 0.06±1 1.06 5 0.399 3 2480 -0.74 -0.74±1 0.26 5 0.334 3 Note: BLE and 2.4G cannot be transmitted simultaneously. Test Results: PASS.

TESTREPORT ReportNo.:8336EU012611W2 Applicant:SANWALIMITED Address:Room1005,10/F,Tower2,Silvercord30CantonRoad, TsimShaTsui,KowloonHongKongChina ProductName:LefthandErgonomicsWirelessMouse2.4G&Bluetooth ModelNo.:GMAERGWBT18WL(refertoclause2.4) Trademark:SANWA FCCID:2AMSUGMAERGWBT18WL TestStandard(s):47CFRPart15.247 TestResult:Pass DateofReceipt:Nov.27,2025 TestDate:Nov.28,2025-Jan.28,2026 DateofIssue:Feb.07,2026 ISSUEDBY: SHENZHENEUTESTINGLABORATORYLIMITED Preparedby:ReviewedandApprovedby: LandonQiu/EngineerSallyZhang/Manager Page2of59ReportNo.:8336EU012611W2 TRFVersion:A01 RevisionRecord ReportVersionIssuedDateDescriptionStatus V0Feb.07,2026OriginalValid Page3of59ReportNo.:8336EU012611W2 TRFVersion:A01 TableofContents 1COVERPAGE...................................................................................................................................................1 2GENERALINFORMATION........................................................................................................................5 2.1APPLICANTINFORMATION...................................................................................................................5 2.2MANUFACTURERINFORMATION...........................................................................................................5 2.3FACTORYINFORMATION......................................................................................................................5 2.4GENERALDESCRIPTIONOFE.U.T......................................................................................................5 2.5TECHNICALINFORMATIONOFE.U.T....................................................................................................6 3TESTSUMMARY.......................................................................................................................................7 3.1TESTSTANDARD................................................................................................................................7 3.2TESTVERDICT...................................................................................................................................7 3.3TESTLABORATORY............................................................................................................................8 4TESTCONFIGURATION...........................................................................................................................9 4.1TESTENVIRONMENT...........................................................................................................................9 4.2TESTEQUIPMENT...............................................................................................................................9 4.3DESCRIPTIONOFSUPPORTUNIT......................................................................................................11 4.4TESTMODE.....................................................................................................................................11 4.5DESCRIPTIONOFCALCULATION........................................................................................................11 4.5.1FieldStrengthCalculation..................................................................................................11 4.5.2DisturbanceCalculation.....................................................................................................11 4.6MEASUREMENTUNCERTAINTY..........................................................................................................12 4.7DEVIATIONFROMSTANDARDS..........................................................................................................12 4.8ABNORMALITIESFROMSTANDARDCONDITION..................................................................................12 5EVALUATIONRESULTS(EVALUATION)..............................................................................................13 5.1ANTENNAREQUIREMENT..................................................................................................................13 5.1.1TestSpecification...............................................................................................................13 5.1.2TestData............................................................................................................................13 6RADIOSPECTRUMMATTERTESTRESULTS(RF)............................................................................14 6.1CONDUCTEDEMISSIONATACPOWERLINE......................................................................................14 6.1.1TestSpecification...............................................................................................................14 6.1.2E.U.T.Operation.................................................................................................................14 6.1.3TestSetupDiagram...........................................................................................................14 6.1.4TestData............................................................................................................................14 6.26DBBANDWIDTH.............................................................................................................................17 6.2.1TestSpecification...............................................................................................................17 6.2.2E.U.T.Operation.................................................................................................................17 6.2.3TestSetupDiagram...........................................................................................................18 6.2.4TestData............................................................................................................................18 6.3MAXIMUMCONDUCTEDOUTPUTPOWER...........................................................................................19 6.3.1TestSpecification............................................................…

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TESTREPORT ReportNo.:8336EU012611W1 Applicant:SANWALIMITED Address:Room1005,10/F,Tower2, Silvercord30 CantonRoad, Tsim Sha Tsui, KowloonHongKongChina ProductName:LefthandErgonomicsWirelessMouse2.4G&Bluetooth ModelNo.:GMAERGWBT18WL(referto clause2.4) Trademark:SANWA FCC ID:2AMSUGMAERGWBT18WL Test Standard(s):47 CFRPart 15.247 Test Result:Pass Dateof Receipt:Nov. 27, 2025 Test Date:Nov. 28, 2025- Jan. 28, 2026 Dateof Issue:Feb. 07, 2026 ISSUEDBY: SHENZHENEU TESTINGLABORATORYLIMITED Preparedby:Reviewedand Approvedby: LandonQiu/ EngineerSallyZhang/Manager Page2 of 70ReportNo.: 8336EU012611W1 TRF Version:A01 RevisionRecord ReportVersionIssuedDateDescriptionStatus V0Feb. 07, 2026OriginalValid Page3 of 70ReportNo.: 8336EU012611W1 TRF Version:A01 Tableof Contents 1COVERPAGE...................................................................................................................................................1 2GENERALINFORMATION........................................................................................................................5 2.1APPLICANTINFORMATION...................................................................................................................5 2.2MANUFACTURERINFORMATION...........................................................................................................5 2.3FACTORYINFORMATION......................................................................................................................5 2.4GENERALDESCRIPTIONOFE.U.T......................................................................................................5 2.5TECHNICALINFORMATIONOFE.U.T....................................................................................................6 3TESTSUMMARY.......................................................................................................................................7 3.1TESTSTANDARD................................................................................................................................7 3.2TESTVERDICT...................................................................................................................................7 3.3TESTLABORATORY............................................................................................................................8 4TESTCONFIGURATION...........................................................................................................................9 4.1TESTENVIRONMENT...........................................................................................................................9 4.2TESTEQUIPMENT...............................................................................................................................9 4.3DESCRIPTIONOFSUPPORTUNIT......................................................................................................11 4.4TESTMODE.....................................................................................................................................11 4.5DESCRIPTIONOFCALCULATION........................................................................................................11 4.5.1FieldStrengthCalculation..................................................................................................11 4.5.2DisturbanceCalculation.....................................................................................................11 4.6MEASUREMENTUNCERTAINTY..........................................................................................................12 4.7DEVIATIONFROMSTANDARDS..........................................................................................................12 4.8ABNORMALITIESFROMSTANDARDCONDITION..................................................................................12 5EVALUATIONRESULTS(EVALUATION)..............................................................................................13 5.1ANTENNAREQUIREMENT..................................................................................................................13 5.1.1Test Specification...............................................................................................................13 5.1.2Test Data ............................................................................................................................13 6RADIOSPECTRUMMATTERTESTRESULTS(RF) ............................................................................14 6.1CONDUCTEDEMISSIONATACPOWERLINE......................................................................................14 6.1.1Test Specification...............................................................................................................14 6.1.2E.U.T.Operation.................................................................................................................14 6.1.3Test SetupDiagram...........................................................................................................14 6.1.4Test Data ............................................................................................................................14 6.26DB BANDWIDTH.............................................................................................................................17 6.2.1Test Specification...............................................................................................................17 6.2.2E.U.T.Operation.................................................................................................................17 6.2.3Test SetupDiagram...........................................................................................................18 6.2.4Test Data ............................................................................................................................18 6.3MAXIMUMCONDUCTEDOUTPUTPOWER...........................................................................................19 6.3.1Test Specification.........…

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ANTENNASPECIFICATION Summary ITEMMouseANTSPEC ModelName2.4GANT Center Frequency 2402MHz2441MHz2480MHz 0.73dBi0.81dBi0.47dBi MAX.Gain0.81dBi AzimuthBeam Pattern Omni-directional Impedance50Ohm AntennaLength25.5mm ManufacturesDONGGUANSHUOCHUANGELECTRONICSCOLTD Address124JinshanRoad，ChashanTown，DongguanCity，GuangdongProvince ANTShapesnakestructure AntennaPhoto&Length(mm) 2402 Total R e s p o n s e ( d B ) -16 2 -12 -8 -4 X Y Z Azimuth = 0.0 Elevation = 0.0 Roll = 0.0 2441 Total R e s p o n s e ( d B ) -16 2 -12 -8 -4 X Y Z Azimuth = 0.0 Elevation = 0.0 Roll = 0.0 2480 Total R e s p o n s e ( d B ) -18 2 -14 -10 -6 -2 X Y Z Azimuth = 0.0 Elevation = 0.0 Roll = 0.0 Frequency (MHz) Gain(dBi) MaxMin 24020.73-9.59 24410.81-7.35 24800.47-8.18