2AOWF-24GRMKX8BitDo Retro 87 Mechanical Keyboard

SHENZHEN 8BITDO TECH CO., LTD. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 27 October 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing & Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2AOWF-24GRMKX SHENZHEN 8BITDO TECH CO., LTD. certifies that the equipment for which authorization is soughtis not equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. SHENZHEN 8BITDO TECH CO., LTD. (“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 D01Covered Equipment Guidance section B(2a) SHENZHEN 8BITDO TECH CO., LTD. certifies that, as of the date of the filing of the application, the applicantis not identified on the Covered List (as specifically named entity or any of its subsidiaries or affiliates) as an entity producing” covered equipment. Sincerely, Printed name: Wei Chao Title: manager Company Name: SHENZHEN 8BITDO TECH CO., LTD. Signed:

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Date: 27 October 2025 SHENZHEN 8BITDO TECH CO., LTD. To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 To Whom It May Concern: The SHENZHEN 8BITDO TECH CO., LTD. , the undersigned, hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the SHENZHEN 8BITDO TECH CO., LTD. solely in matters relating to theapplication for an FCC equipment authorization for FCC ID: 2AOWF-24GRMKX including the signing of documents in connection with this Application. Necessary acts carried out by Shenzhen BALUN Technology Co., Ltd. in connection with the Application shall have the same effectasactsoftheSHENZHEN8BITDOTECHCO.,LTD. The SHENZHEN 8BITDO TECH CO., LTD. also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862. Yours Sincerely, _______ WeiChao

Date:27 October 2025 SHENZHEN 8BITDO TECH CO., LTD. To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: SHENZHEN 8BITDO TECH CO., LTD. FCC ID:2AOWF-24GRMKX FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. SHENZHEN 8BITDO TECH CO., LTD. requests that the following documents regarding this submissionfor FCC ID: 2AOWF-24GRMKX be kept confidential: Exhibit TypeFile Name Block DiagramBlock Diagram.pdf SchematicsSchematics.pdf Operational Description Operational Description.pdf And below exhibit kept short-term confidential (180 days): External photosExternal photos.pdf Test setup photostest photo.pdf Internal photosInternal photos.pdf User manualUser manual.pdf Those documents contain detailed system and equipment description and related information about the product which SHENZHEN 8BITDO TECH CO., LTD. considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Sincethis design is a basis form which future technological products will evolve, SHENZHEN 8BITDO TECH CO., LTD. considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, WeiChao

Report No.: BL-SZ2480173-701 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: SHENZHEN 8BITDO TECH CO., LTD. Address: Room 210, Building 1, Nanhai Ecool, NO.6 Xinghua Road, Shekou, Nanshan District Shenzhen 518067 China Equipment Type: 8BitDo Retro 87 Mechanical Keyboard Model Name: 85HD Brand Name: 8BITDO FCC ID: 2AOWF-24GRMKX Test Standard: 47 CFR Part 2.1093 KDB 447498 D04 v01 Sample Arrival Date: Nov. 20, 2024 Test Date: Nov. 28, 2024 - Feb. 20, 2025 Date of Issue: Oct. 22, 2025 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ2480173-701 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 Oct. 22, 2025 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-SZ2480173-701 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-SZ2480173-701 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 SHENZHEN 8BITDO TECH CO., LTD. Address Room 210, Building 1, Nanhai Ecool, NO.6 Xinghua Road, Shekou, Nanshan District Shenzhen 518067 China 2.2 Manufacturer Information Manufacturer SHENZHEN ONEBITDO TECH CO., LTD. Address Room 203, Building 1, Huajian Building, Xinghua Road, Shekou, Shuiwan Community, Zhaoshang Street, Nanshan District, Shenzhen, China 2.3 General Description for Equipment under Test (EUT) EUT Name 8BitDo Retro 87 Mechanical Keyboard Model Name Under Test 85HD Series Model Name N/A Description of Model name differentiation N/A Hardware Version v1.03 Software Version V1.00 Dimensions (Approx.) N/A Weight (Approx.) N/A 2.4 Technical Information Network and Wireless connectivity Bluetooth (BLE), 2.4G ISM Band The requirement for the following technical information of the EUT was tested in this report: Operating Mode Bluetooth, 2.4G ISM Band Frequency Range Bluetooth 2402 ~ 2480 MHz 2.4G ISM Band 2402 ~ 2480 MHz Antenna Type Bluetooth PCB Antenna 2.4G ISM Band PCB Antenna Exposure Category General Population/Uncontrolled Exposure Product Type Portable Device Report No.: BL-SZ2480173-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 5 / 9 Web: www.titcgroup.com Template No.: TRP-FC…

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Report No.: BL-SZ1910490-901 2 / 16 Revision History Version Issue Date Revisions Rev. 01 Mar. 27, 2019 Initial Issue TABLE OF CONTENTS 1 Administrative Data (GENERAL INFORMATION) .................................................................................. 3 1.1 Identification of the Testing Laboratory ............................................................................................ 3 1.2 Identification of the Responsible Testing Location ........................................................................... 3 1.3 Laboratory Condition ....................................................................................................................... 3 1.4 Announce ........................................................................................................................................ 3 2 PRODUCT INFORMATION ................................................................................................................... 5 2.1 Applicant Information ....................................................................................................................... 5 2.2 Manufacturer Information ................................................................................................................ 5 2.3 Factory Information ......................................................................................................................... 5 2.4 General Description for Equipment under Test (EUT) ..................................................................... 5 2.5 Ancillary Equipment ......................................................................................................................... 6 2.6 Technical Information ...................................................................................................................... 6 3 SUMMARY OF TEST RESULTS ........................................................................................................... 7 3.1 Test Standards ................................................................................................................................ 7 3.2 Test Verdict ..................................................................................................................................... 7 3.3 Test Uncertainty .............................................................................................................................. 7 4 GENERAL TEST CONFIGURATIONS .................................................................................................. 8 4.1 Test Condition ................................................................................................................................. 8 4.2 Test Equipment List ......................................................................................................................... 8 4.3 Test Setup ....................................................................................................................................... 8 ANNEX A TEST RESULTS ....................................................................................................................... 9 A.1 Gain and Efficiency ......................................................................................................................... 9 ANNEX B RADIATION PATTERN .......................................................................................................... 10 ANNEX C TEST SETUP PHOTO ............................................................................................................ 14 ANNEX D EUT PHOTO .......................................................................................................................... 15 Report No.: BL-SZ1910490-901 3 / 16 1 Administrative Data (GENERAL INFORMATION) 1.1 Identification of the Testing Laboratory Company Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1st FL, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Identification of the Responsible Testing Location Test Location Shenzhen BALUN Technology Co., Ltd. Address Block B, 1st FL, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Accreditation Certificate The laboratory is a testing organization accredited by China National Accreditation Service for Conformity Assessment (CNAS) according to ISO/IEC 17025. The accreditation certificate number is L6791. The laboratory is a testing organization accredited by China Metrology Accreditation (CMA). The accreditation certificate number is 2017192290Z. Description All measurement facilities used to collect the measurement data are located at Block B, FL 1, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 518055 1.3 Laboratory Condition Ambient Temperature 19°C to 25°C Ambient Relative Humidity 45% to 55% Ambient Pressure 100 kPa to 102 kPa 1.4 Announce (1) The test report reference to the report template version v2.2. (2) The test report is invalid if not marked with the signatures of the persons responsible for preparing and approving the test report. (3) The test report is invalid if there is any evidence and/or falsification. (4) The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. (5) This document may not be altered or revised in any way unless done so by BALUN and all revisions are duly noted in the revisions section. (6) Content of the test report, in part or in full, cannot be used for publicity and/or promotional purposes without Report No.: BL-SZ1910490-901 4 / 16 prior written approval from the laboratory. Report No.: BL-SZ1910490-901 5 / 16 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant SHENZHEN 8BITDO TECH CO., LTD Address Room 210, Building 1, Nanhai Ecool, No.6 Xinghua Road, Shekou, Nans…

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Report No.: BL-SZ2480173-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 47 Web: www.titcgroup.com Template No.: TRP-FCC&ISED 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: SHENZHEN 8BITDO TECH CO., LTD. Address: Room 210, Building 1, Nanhai Ecool, NO.6 Xinghua Road, Shekou, Nanshan District Shenzhen 518067 China Equipment Type: 8BitDo Retro 87 Mechanical Keyboard Model Name: 85HD Brand Name: 8BITDO FCC ID: 2AOWF-24GRMKX ISED Number: 29401-24GRMKX Test Standard: 47 CFR Part 15 Subpart C RSS-Gen Issue 5 RSS-247 Issue 3 (refer to section 3.1) Sample Arrival Date: Nov. 20, 2024 Test Date: Nov. 28, 2024 - Jan. 09, 2025 Date of Issue: Oct. 22, 2025 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Julie Zhu Checked by: Ye Hongji Approved by: Sunny Zou (Technical Director) _______________ _______________ _______________ Report No.: BL-SZ2480173-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 47 Web: www.titcgroup.com Template No.: TRP-FCC&ISED 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 Oct. 22, 2025 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 Test Verdict .................................................................................................................... 7 4 GENERAL TEST CONFIGURATIONS ........................................................................................ 8 4.1 Test Environments ......................................................................................................... 8 4.2 Test Equipment List ........................................................................................................ 8 4.3 Test Software List ........................................................................................................... 8 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-SZ2480173-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 47 Web: www.titcgroup.com Template No.: TRP-FCC&ISED 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, E.I.R.P .................................................................................................. 29 A.2 Occupied Bandwidth .................................................................................................... 31 A.3 Conducted Spurious Emissions ................................................................................... 33 A.4 Band Edge (Authorized-band band-edge) .................................................................... 36 A.5 Conducted Emissions ................................................................................................... 37 A.6 Radiated Spurious Emission .....................…

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