2A4DH-2880Wireless Accessory

Docusign Envelope ID: 4149DBFB-74B5-425F-85C5-B09367A940D2 CC STC 00523131 2025 TR Amazon.com Services LLC 410 Terry Avenue N, Seattle, Washington 98109, United States Tel: (650) 426-1100 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: Amazon.com Services LLC, Grantee Code: 2A4DH) Attestation Statement FRN: 0026561829 Reference: a) FCC CFR section 2.911(d)(5)(i) b) FCC Section 2.911(d)(5)(ii) c) FCC Section 2.911(d)(7) a) Amazon.com Services LLC certifies that the equipment FCC ID: 2A4DH-2880 for which authorization is sought is not “Covered “equipment prohibited from receiving an equipment authorization pursuant to § 2.903 of CFR title 47; b) Amazon.com Services LLC (“the applicant”) certifies that, the device does not have cybersecurity and / or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, identified on the Covered List installed on the device, nor will it be installed by the applicant any time after certification. c) Amazon.com Services LLC (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment and is not an affiliate or subsidiary of an entity identified on the Covered List. d) Amazon.com Services LLC hereby designates itself for the purpose of accepting service of process. Amazon.com Services LLC acknowledges its consent and obligation to accept service of process in the United States for matters related to the applicable equipment at the physical U.S. address and email address indicated below, and accepts the obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges their responsibility to inform the FCC whenever the following agent information changes. Docusign Envelope ID: 4149DBFB-74B5-425F-85C5-B09367A940D2 CC STC 00523131 2025 TR Amazon.com Services LLC 410 Terry Avenue N, Seattle, Washington 98109, United States Tunji Yusuf, (650) 426-1100, [email protected] Applicant’s Authorized Signature Tunji Yusuf Date: August 11, 2026

Date: January 16, 2026 Federal Communications Commission Office of Engineering and Technology Laboratory Division 7435 Oakland Mills Rd Columbia MD 21046-1609 Subject: Attestation PIA Compliance for FCC ID: 2A4DH-2880 We, Sporton International Inc., hereby confirm that the submitted product and the associated technology fully comply with condition for the NUMSIM PAG exception as outlined in KDB 388624-D02. The testing has been conducted using the SPEAG DASY8 WPT module WPT v2.8+ system for SAR compliance in the frequency range 111 kHz to 489 kHz. SPEAG has already obtained FCC approval through the PIA inquiry 130303. Our measurements and evaluations strictly adhere to the procedures that are submitted during the PIA inquiry process and accepted by the FCC. Sincerely, ________________________ Name: Eric Huang E-mail: [email protected]

CC STC 00523141 2025 TR Date: January 5, 2026 To the Certification Body, Amazon.com Services LLC hereby authorizes Sporton International Inc., located at No.52, Huaya 1st Rd., Guishan Dist., Taoyuan City, Taiwan, R.O.C., to provide and prepare all documentation relating to our product certification, including the signing of application forms for Model Name B85V52 (“Product”), FCC ID 2A4DH-2880 directly to the Certification Body on our behalf. Sporton International Inc. is also authorized under this letter to respond on our behalf directly to the Certification Body’s questions about the Product and reports as necessary to assist the Certification Body in the FCC certification. We further certify that neither the applicant nor any party to this application, as defined in 47 CFR Ch. 1.2002(b), is subject to a denial to federal benefits, that include FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from Amazon.com Services LLC. Sincerely, Amazon.com Services LLC By: Tunji Yusuf Title: Authorized Signatory Address: 410 Terry Avenue North, Seattle, WA 98109-5210 Email: [email protected] Docusign Envelope ID: F54652BB-9602-4830-B760-AFD22FEC0786

CC STC 00523151 2025 TR Amazon.com Services LLC 410 Terry Avenue, SeattleWashington 98109, United States Tel: (650) 694-8333 Date: January 5, 2026 Federal Communications Commission Office of Engineering and Technology Laboratory Division 7435 Oakland Mills Rd Columbia MD 21046-1609 Subject: Request for Confidentiality FCC ID: 2A4DH-2880 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission’s rules (47CFR§§0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure indefinitely. ⚫ Schematic Diagram ⚫ Block Diagram ⚫ Part List ⚫ Operational Description ⚫ Tune up procedure Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commission’ s policy, in order to comply with the marketing regulations in 47 CFT §2.803 and the importation rules in 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices. We are requesting the commission to grant short-term confidentiality request on the following attachment(s) for 180 days after the grant as outlined in Public Notice DA 04-1705. ⚫ External Photos ⚫ Internal Photos ⚫ Test Setup Photos ⚫ User Manual It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Best Regards, ______________________________ Tunji Yusuf [email protected] Docusign Envelope ID: 5AED06B4-0E74-45FF-B3FA-ADCA42225A54

1 FCC E-Label Information A. Information to be displayed 1. The information that will be displayed on the e-label and information that will remain in the user manual is shown below: Information on E-label In Manual FCC ID number Yes No FCC logo No No 15.19 statement (“This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.”) No Yes Images of the e-label screen are provided below: Model no: B85V52 United States FCC ID:2A4DH-2880 B. Access to the required information on the e-label Users must be able to access the regulatory information without requiring special access codes or permissions, and in all cases the information must be accessible in no more than three steps from a product’s main or home menu. Certification information can be found electronically in the device's Settings Menu under Keyboard & Pen > Regulatory Information Instructions must be provided with the product at the time of purchase, in the user manual, operating instructions, packaging material, quick guide pamphlet, etc. Alternatively, a product- related website is permitted, if a reference (URL) to obtain the website information is provided at the time of purchase in the user manual, operating instructions, packaging material, quick guide pamphlet, etc. The information to the user is provided in the user manual. Products must not require special accessories or supplemental plug-ins (e.g., the installation of a SIM/USIM card) to access the information. Access to regulatory information must be provided without special codes, accessories, or permissions beyond the normal security protection to unlock the screen, sign-in page, or overall product access. The devices do not require special code, accessories or supplemental plug-ins to access the information. The FCC ID, warning statements, or other information must be displayed electronically in a manner that is clearly legible without the aid of magnification. Yes, it is clearly legible without the aid of magnification. Both regulatory information and dedicated exclusive application(s) or script(s) must be secured and implemented in a factory-set-unalterable format. The regulatory information must be capable of being retrieved and displayed locally, and under the control of the end user in possession of the product. The method must be secure, such that the application or script ensures that the regulatory information correctly displayed. Yes, it is secured, and the user cannot modify it. C. Labeling for Importation and Purchasing When e-labeling is used, a physical temporary label is also required on the product, or a label on the packaging, at the time of importation, marketing, and sales. The physical label can be a summary version of the required regulatory FCC ID and model number are present on the product packaging. information, such that the product can be identified as complying with the FCC’s equipment authorization requirements. The information may simply be the FCC ID for products subject to certification. Products imported that are already packaged for sale and have a physical temporary label will satisfy this requirement. However, for products imported in bulk and not packaged individually, it is acceptable to use a temporary removable adhesive label on the product, or temporary or permanent labels on the shipping packaging or protective bags. Any removable adhesive label shall be of a type intended to survive normal shipping and handling.

Sporton International Inc. (Shenzhen) Page Number : 1 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 RF Exposure Evaluation Report APPLICANT : Amazon.com Services LLC EQUIPMENT : Wireless Accessory MODEL NAME : B85V52 FCC ID : 2A4DH-2880 STANDARD : 47 CFR PART 2.1093 The product evaluation date was started from Sep. 08, 2025 and completed on Sep. 08, 2025. We, Sporton International Inc. (Shenzhen),, would like to declare that the device has been evaluated in accordance with 47 CFR Part 2.1093 and FCC KDB 447498 D04 v01, and pass the limit. Without written approval of Sporton International Inc. (Shenzhen),, the test report shall not be reproduced except in full. Approved by: Hank Huang Sporton International Inc. (Shenzhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (Shenzhen) Page Number : 2 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 Table of Contents 1. ADMINISTRATION DATA ........................................................................................................................... 4 1.1. Testing Laboratory ............................................................................................................................. 4 2. DESCRIPTION OF EQUIPMENT UNDER TEST (EUT) ............................................................................. 5 3. MAXIMUM RF TUNE UP POWER AMONG PRODUCTION UNITS .......................................................... 5 4. RF EXPOSURE EVALUATION ................................................................................................................... 6 Sporton International Inc. (Shenzhen) Page Number : 3 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 Revision History REPORT NO. VERSION DESCRIPTION ISSUED DATE FA520616-01 Rev. 01 Initial issue of report Sep. 15, 2025 FA520616-01 Rev. 02 Updated Equipment Name This report is an updated version, replacing the report issued on Sep. 15, 2025. Feb. 09, 2026 Sporton International Inc. (Shenzhen) Page Number : 4 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 1. Administration Data 1.1. Testing Laboratory Sporton International Inc. (Shenzhen) is accredited to ISO/IEC 17025:2017 by American Association for Laboratory Accreditation with Certificate Number 5145.01. Testing Laboratory Test Firm Sporton International Inc. (Shenzhen) Test Site Location 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China TEL: +86-755-86379589 FAX: +86-755-86379595 Test Site No. Sporton Site No. FCC Designation No. FCC Test Firm Registration No. SAR01-SZ CN1256 421272 Applicant Company Name Amazon.com Services LLC Address 410 Terry Avenue N, Seattle, WA 98109-5210, United States Sporton International Inc. (Shenzhen) Page Number : 5 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 2. Description of Equipment Under Test (EUT) Product Feature & Specification EUT Type Wireless Accessory Model Name B85V52 FCC ID 2A4DH-2880 Wireless Technology and Frequency Range Bluetooth: 2402 MHz ~ 2480 MHz specific RF technology: 111 kHz ~ 489 kHz Mode Bluetooth LE specific RF technology: BPSK Antenna Type Bluetooth : FPC Antenna specific RF technology: Coil Antenna Antenna Gain Bluetooth: gain -0.58 dBi Remark: 1. The above EUT's information was declared by manufacturer. Please refer to the specifications or user's manual for more detailed description. 2. The EUT is only used with the designated tablet through software control, and the operating frequency is 339.302 kHz. 3. The specific RF technology RF Exposure report will be separately submitted. Comments and Explanations: 1. The declared of product specification for EUT presented in the report are provided by the manufacturer, and the manufacturer takes all the responsibilities for the accuracy of product specification. 2. The maximum RF output tune up power, antenna gain also the safe distance used for evaluate RF exposure were declared by manufacturer. 3. Maximum RF Tune Up power among production units <Bluetooth> Mode Maximum Average Power (dBm) Bluetooth LE 0.00 Sporton International Inc. (Shenzhen) Page Number : 6 of 6 TEL : +86-755-86379589 / FAX : +86-755-86379595 Report Issued Date : Feb. 09, 2026 FCC ID : 2A4DH-2880 Report Version : Rev. 02 RF Exposure Evaluation Report Report No. : FA520616-01 4. RF Exposure Evaluation Mode Maximum Average Power (dBm) Bluetooth LE 0.00 General Note: 1. Per KDB 447498 D04v01, Maximum power defines the thresholds in general for either available maximum time-averaged power or maximum time-averaged ERP, whichever is greater. 2. Per KDB 447498 D04v01, the separation distance is the smallest distance from any part of the antenna or radiating structure for all persons, during operation at the applicable ERP. for larger devices, the test separation distance of adjacent edge configuration is determined by the closest separation between the antenna and the user. 3. Per KDB 447498 D04v01, the SAR-based exemption formula of § 1.1307(b)(3)(i)(B), repeated here as Formula (B.2), applies for single fixed, mobile, and portable RF sources with available maximum time-averaged power or effective radiated power (ERP), whichever is greater, of less than or equal to the threshold Pth (mW)…

Text truncated - open the document above for the full version.

Sporton International Inc. (ShenZhen) Page Number : 1 of 35 TEL : +86-755-8637-9589 Report Issued Date : Feb. 09, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 03 FCC ID: 2A4DH-2880 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR520616-01A FCC RF Test Report APPLICANT : Amazon.com Services LLC EQUIPMENT : Wireless Accessory MODEL NAME : B85V52 FCC ID : 2A4DH-2880 STANDARD : FCC Part 15 Subpart C §15.247 CLASSIFICATION : (DTS) Digital Transmission System TEST DATE(S) : Aug. 18, 2025 ~ Aug. 21, 2025 We, Sporton International Inc. (Shenzhen), would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Shenzhen), the test report shall not be reproduced except in full. Approved by: Fly Liang Sporton International Inc. (ShenZhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (ShenZhen) Page Number : 2 of 35 TEL : +86-755-8637-9589 Report Issued Date : Feb. 09, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 03 FCC ID: 2A4DH-2880 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR520616-01A TABLE OF CONTENTS REVISION HISTORY .......................................................................................................................................... 3 SUMMARY OF TEST RESULT ......................................................................................................................... 4 1 GENERAL DESCRIPTION .......................................................................................................................... 5 1.1 Applicant ............................................................................................................................................ 5 1.2 Product Feature of Equipment Under Test ........................................................................................ 5 1.3 Product Specification of Equipment Under Test ................................................................................ 5 1.4 Modification of EUT ........................................................................................................................... 5 1.5 Testing Location ................................................................................................................................ 6 1.6 Test Software ..................................................................................................................................... 6 1.7 Applicable Standards ......................................................................................................................... 6 2 TEST CONFIGURATION OF EQUIPMENT UNDER TEST ........................................................................ 7 2.1 Carrier Frequency Channel ............................................................................................................... 7 2.2 Test Mode .......................................................................................................................................... 8 2.3 Connection Diagram of Test System ................................................................................................. 9 2.4 Support Unit used in test configuration and system ........................................................................ 10 2.5 EUT Operation Test Setup .............................................................................................................. 10 2.6 Measurement Results Explanation Example ................................................................................... 10 3 TEST RESULT .......................................................................................................................................... 11 3.1 6dB and 99% Bandwidth Measurement .......................................................................................... 11 3.2 Output Power Measurement ............................................................................................................ 16 3.3 Power Spectral Density Measurement ............................................................................................ 17 3.4 Conducted Band Edges and Spurious Emission Measurement ..................................................... 22 3.5 Radiated Band Edges and Spurious Emission Measurement ........................................................ 27 3.6 AC Conducted Emission Measurement........................................................................................... 31 3.7 Antenna Requirements .................................................................................................................... 33 4 LIST OF MEASURING EQUIPMENT ........................................................................................................ 34 5 MEASUREMENT UNCERTAINTY ............................................................................................................ 35 APPENDIX A. CONDUCTED TEST RESULTS APPENDIX B. AC CONDUCTED EMISSION TEST RESULT APPENDIX C. RADIATED SPURIOUS EMISSION APPENDIX D. DUTY CYCLE PLOTS Sporton International Inc. (ShenZhen) Page Number : 3 of 35 TEL : +86-755-8637-9589 Report Issued Date : Feb. 09, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 03 FCC ID: 2A4DH-2880 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR520616-01A REVISION HISTORY REPORT NO. VERSION DESCRIPTION ISSUED DATE FR520616-01A Rev. 01 Initial issue of report Sep. 12, 2025 FR520616-01A Rev. 02 Updated the version of ANSI C63.10 This report is an updated version, replacing the report issued on Sep. 12, 2025. Feb. 05, 2026 FR520616-01A Rev. 03 Updated the information of Equipment name This r…

Text truncated - open the document above for the full version.

Test Report for Antenna Specifications Model: B85V52 Frequency range and operation Antenna: 2400MHz ~ 2483.5MHz Antenna type Antenna: FPC Antenna Test Lab name: Shenzhen BALUN Technology Co., Ltd Test date: 2025.01.15 Tested by: Mai Jintian Lab address: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Test Equipment used Test set up and block diagram of test setup Antenna Gain Antenna Radiation Pattern (3D) Antenna Radiation Pattern (2D)