2A4DH-8573Electronic Display Device

CC STC 00221469 2026 TR Date: May 14, 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 Z8PC57 (“Product”), FCC ID 2A4DH-8573 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]

CC STC 00392678 2026 TR Amazon.com Services LLC 410 Terry Avenue N, Seattle, Washington 98109, United States Tel: (650) 694-1100 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-8573 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 anytime 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: B177FAA9-CAD9-8E64-8253-D87C4B443C35 CC STC 00392678 2026 TR Amazon.com Services LLC 410 Terry Avenue N, Seattle, Washington 98109, United States Tunji Yusuf, (650) 694-1100, [email protected] Applicant’s Authorized Signature Tunji Yusuf Date: August 12, 2026 Docusign Envelope ID: B177FAA9-CAD9-8E64-8253-D87C4B443C35

CC STC 00221315 2026 TR Amazon.com Services LLC 410 Terry Avenue N, SeattleWashington 98109, United States Tel: (650) 426-1100 Date: May 25, 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-8573 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 that information will be available for public review once the grant of equipment authorization is issued. Docusign Envelope ID: 107DB9F6-AB61-8E8E-8389-AFDBEEA9C79E CC STC 00221315 2026 TR Best Regards, ____________________________ Tunji Yusuf [email protected] Docusign Envelope ID: 107DB9F6-AB61-8E8E-8389-AFDBEEA9C79E

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: Z8PC57 United States FCC ID: 2A4DH-8573 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. The actual steps are: To access the e-label information, in the device, Choose: Settings > Legal and Compliance > Regulatory Information No special access codes or permissions are required to go through the above steps beyond entering a user-defined password to protect against unauthorized access to the device. 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. (Kunshan) Page : 1 of 32 TEL : +86-512-57900158 Issued Date : May 07, 2026 FCC ID : 2A4DH-8573 Report Template No. : 200414 FCC SAR Test Report Report No. : FA5O1503-01 FCC SAR Test Report APPLICANT : Amazon.com Services LLC EQUIPMENT : Electronic Display Device MODEL NAME : Z8PC57 FCC ID : 2A4DH-8573 STANDARD : FCC 47 CFR Part 2 (2.1093) We, Sporton International Inc. (Kunshan), would like to declare that the tested sample has been evaluated in accordance with the test procedures given in 47 CFR Part 2.1093 and FCC KDB 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. (Kunshan), the test report shall not be reproduced except in full. Approved by: Si Zhang Sporton International Inc. (Kunshan) No. 1098, Pengxi North Road, Kunshan Economic Development Zone Jiangsu Province 215300 People’s Republic of China Sporton International Inc. (Kunshan) Page : 2 of 32 TEL : +86-512-57900158 Issued Date : May 07, 2026 FCC ID : 2A4DH-8573 Report Template No. : 200414 FCC SAR Test Report Report No. : FA5O1503-01 Table of Contents 1. Statement of Compliance ............................................................................................................................................. 4 2. Administration Data ...................................................................................................................................................... 5 3. Guidance Applied .......................................................................................................................................................... 5 4. Equipment Under Test (EUT) Information ................................................................................................................... 6 4.1 General Information ............................................................................................................................................... 6 5. RF Exposure Limits....................................................................................................................................................... 7 5.1 Uncontrolled Environment ...................................................................................................................................... 7 5.2 Controlled Environment .......................................................................................................................................... 7 6. Specific Absorption Rate (SAR) ................................................................................................................................... 8 6.1 Introduction ............................................................................................................................................................ 8 6.2 SAR Definition ........................................................................................................................................................ 8 7. System Description and Setup .................................................................................................................................... 9 7.1 E-Field Probe ........................................................................................................................................................10 7.2 Data Acquisition Electronics (DAE) .......................................................................................................................10 7.3 Phantom ................................................................................................................................................................ 11 7.4 Device Holder........................................................................................................................................................12 8. Measurement Procedures ...........................................................................................................................................13 8.1 Spatial Peak SAR Evaluation ................................................................................................................................13 8.2 Power Reference Measurement............................................................................................................................14 8.3 Area Scan .............................................................................................................................................................14 8.4 Zoom Scan ............................................................................................................................................................15 8.5 Volume Scan Procedures ......................................................................................................................................15 8.6 Power Drift Monitoring ...........................................................................................................................................15 9. Test Equipment List .....................................................................................................................................................16 10. System Verification ....................................................................................................................................................17 10.1 Tissue Simulating Liquids ....................................................................................................................................17 10.2 Tissue Verification ...............................................................................................................................................18 10.3 System Performance Check Results ...................................................................................................................18 11. RF Exposure Positions ......................…

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Date: 2026-04-15 System Check_Head_2450MHz DUT: D2450V2 - SN1095 Communication System: CW; Frequency: 2450.000 MHz; Duty Cycle: 1:1 Medium: HSL_2450_260415 Medium parameters used: f= 2450.000 MHz; σ= 1.76 S/m; ε r = 39.2 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(7.65, 7.44, 7.58); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Pin=50mW/Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 2.41 W/kg; SAR (10g) = 1.20 W/kg; Pin=50mW/Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 5.0 mm x 5.0 mm x 1.5 mm Power Drift = -0.01 dB SAR (1g) = 2.71 W/kg; SAR (10g) = 1.31 W/kg Smallest distance from peaks to all points 3 dB below = 9.0 mm Ratio of SAR at M2 to SAR at M1 = 85.0 % Appendix AReport No. : FA5O1503-01 Page:1/4 Date: 2026-04-16 System Check_Head_5250MHz DUT: D5GHzV2 - SN1113 Communication System: CW; Frequency: 5250.000 MHz; Duty Cycle: 1:1 Medium: HSL_5250_260416 Medium parameters used: f= 5250.000 MHz; σ= 4.71 S/m; ε r = 36.5 Ambient Temperature: 23.1°C; Liquid Temperature: 22.8°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.9, 5.74, 5.85); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Pin=50mW/Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 3.20 W/kg; SAR (10g) = 1.03 W/kg; Pin=50mW/Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = -0.02 dB SAR (1g) = 4.14 W/kg; SAR (10g) = 1.20 W/kg Smallest distance from peaks to all points 3 dB below = 6.3 mm Ratio of SAR at M2 to SAR at M1 = 64.2 % Appendix AReport No. : FA5O1503-01 Page:2/4 Date: 2026-04-17 System Check_Head_5600MHz DUT: D5GHzV2 - SN1113 Communication System: CW; Frequency: 5600.000 MHz; Duty Cycle: 1:1 Medium: HSL_5600_260417 Medium parameters used: f= 5600.000 MHz; σ= 5.03 S/m; ε r = 36.0 Ambient Temperature: 23.2°C; Liquid Temperature: 22.8°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.45, 5.3, 5.4); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Pin=50mW/Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 3.26 W/kg; SAR (10g) = 1.04 W/kg; Pin=50mW/Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = -0.02 dB SAR (1g) = 4.29 W/kg; SAR (10g) = 1.23 W/kg Smallest distance from peaks to all points 3 dB below = 6.3 mm Ratio of SAR at M2 to SAR at M1 = 60.3 % Appendix AReport No. : FA5O1503-01 Page:3/4 Date: 2026-04-20 System Check_Head_5800MHz DUT: D5GHzV2 - SN1113 Communication System: CW; Frequency: 5800.000 MHz; Duty Cycle: 1:1 Medium: HSL_5800_260420 Medium parameters used: f= 5800.000 MHz; σ= 5.19 S/m; ε r = 35.8 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.31, 5.17, 5.27); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Pin=50mW/Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 3.02 W/kg; SAR (10g) = 0.968 W/kg; Pin=50mW/Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = 0.03 dB SAR (1g) = 4.00 W/kg; SAR (10g) = 1.15 W/kg Smallest distance from peaks to all points 3 dB below = 6.8 mm Ratio of SAR at M2 to SAR at M1 = 58.7 % Appendix AReport No. : FA5O1503-01 Page:4/4

Date: 2026-04-15 01_WLAN2.4GHz_802.11b 1Mbps_Bottom Face_5mm_Ch12 Communication System: IEEE 802.11b WiFi 2.4 GHz Frequency: 2467.000MHz; Duty Cycle: 1:1.009 Medium: HSL_2450_260415 Medium parameters used: f= 2467.000 MHz; σ= 1.82 S/m; ε r = 39.0 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(7.65, 7.44, 7.58); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: WLAN, 10012-CAB Area Scan (140.0 mm x 200.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 0.575 W/kg; SAR (10g) = 0.281 W/kg; Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 5.0 mm x 5.0 mm x 1.5 mm Power Drift = -0.08 dB SAR (1g) = 0.545 W/kg; SAR (10g) = 0.276 W/kg Smallest distance from peaks to all points 3 dB below = 9.9 mm Ratio of SAR at M2 to SAR at M1 = 76.3 % Appendix BReport No. : FA5O1503-01 Page:1/5 Date: 2026-04-16 02_WLAN5GHz_802.11a 6Mbps_Bottom Face_5mm_Ch60 Communication System: IEEE 802.11a/h WiFi 5 GHz Frequency: 5300.000MHz; Duty Cycle: 1:1.034 Medium: HSL_5250_260416 Medium parameters used: f= 5300.000 MHz; σ= 4.74 S/m; ε r = 36.4 Ambient Temperature: 23.1°C; Liquid Temperature: 22.8°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.9, 5.74, 5.85); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: WLAN, 10062-CAE Area Scan (140.0 mm x 200.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 0.901 W/kg; SAR (10g) = 0.307 W/kg; Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = -0.04 dB SAR (1g) = 0.941 W/kg; SAR (10g) = 0.317 W/kg Smallest distance from peaks to all points 3 dB below = 7.4 mm Ratio of SAR at M2 to SAR at M1 = 65.8 % Appendix BReport No. : FA5O1503-01 Page:2/5 Date: 2026-04-20 03_WLAN5GHz_802.11n-HT40 MCS0_Bottom Face_5mm_Ch142 Communication System: IEEE 802.11n Frequency:5710.000 MHz; Duty Cycle: 1:1.067 Medium: HSL_5800_260420 Medium parameters used: f= 5710.000 MHz; σ= 5.19 S/m; ε r = 35.7 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.31, 5.17, 5.27); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: WLAN, 10599-AAD Area Scan (140.0 mm x 200.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 0.867 W/kg; SAR (10g) = 0.285 W/kg; Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = 0.01 dB SAR (1g) = 0.908 W/kg; SAR (10g) = 0.295 W/kg Smallest distance from peaks to all points 3 dB below = 7.2 mm Ratio of SAR at M2 to SAR at M1 = 62.1 % Appendix BReport No. : FA5O1503-01 Page:3/5 Date: 2026-04-20 04_WLAN5GHz_802.11n-HT40 MCS0_Bottom Face_5mm_Ch151 Communication System: IEEE 802.11n Frequency:5755.000 MHz; Duty Cycle: 1:1.067 Medium: HSL_5800_260420 Medium parameters used: f= 5755.000 MHz; σ= 5.24 S/m; ε r = 35.8 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(5.31, 5.17, 5.27); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: WLAN, 10599-AAD Area Scan (140.0 mm x 200.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 0.856 W/kg; SAR (10g) = 0.286 W/kg; Zoom Scan (22.0 mm x 22.0 mm x 22.0 mm): Measurement Grid: 4.0 mm x 4.0 mm x 1.4 mm Power Drift = 0.01 dB SAR (1g) = 0.897 W/kg; SAR (10g) = 0.290 W/kg Smallest distance from peaks to all points 3 dB below = 7.6 mm Ratio of SAR at M2 to SAR at M1 = 61.7 % Appendix BReport No. : FA5O1503-01 Page:4/5 Date: 2026-04-15 05_Bluetooth_1Mbps_Bottom Face_5mm_Ch78 Communication System: IEEE 802.15.1 Bluetooth Frequency: 2480.000 MHz;Duty Cycle: 1:1.301 Medium: HSL_2450_260415 Medium parameters used: f= 2480.000 MHz; σ= 1.81 S/m; ε r = 38.9 Ambient Temperature: 23.2°C; Liquid Temperature: 22.7°C DASY6 Configuration: - Probe: EX3DV4 - SN7764; ConvF(7.65, 7.44, 7.58); Calibrated: 2025-10-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1691; Calibrated: 2025-06-04 - Phantom: Twin-SAM V8.0 (30deg probe tilt); Serial: 2022; Section: Flat - Measurement Software: 16.4.0.5005 - UID: Bluetooth, 10032-CAA Area Scan (140.0 mm x 200.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 0.067 W/kg; SAR (10g) = 0.033 W/kg; Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 5.0 mm x 5.0 mm x 1.5 mm Power Drift = 0.01 dB SAR (1g) = 0.065 W/kg; SAR (10g) = 0.033 W/kg Smallest distance from peaks to all points 3 dB below = 10.3 mm Ratio of SAR at M2 to SAR at M1 = 83.3 % Appendix BReport No. : FA5O1503-01 Page:5/5

Appendix C Report No. : FA5O1503-01 Page:1/45 Appendix C Report No. : FA5O1503-01 Page:2/45 Appendix C Report No. : FA5O1503-01 Page:3/45 Appendix C Report No. : FA5O1503-01 Page:4/45 Appendix C Report No. : FA5O1503-01 Page:5/45 Appendix C Report No. : FA5O1503-01 Page:6/45 Appendix C Report No. : FA5O1503-01 Page:7/45 D2450V2, Serial No. 1095 Extended Dipole Calibrations If dipoles are verified in return loss (<-20dB, within 20% of prior calibration), and in impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration interval can be extended. D2450V2 – serial no. 1095 2450 Head Date of Measurement Return-Loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary Impedance (ohm) Delta (ohm) 2024.2.8 -24.264 51.343 6.0670 2025.2.7 -24.840 2% 52.727 1.384 6.5740 0.507 2026.2.6 -23.389 -4% 51.314 -0.029 6.0825 0.015 <Justification of the extended calibration> The return loss is < -20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. Dipole Verification Data> D2450V2, serial no. 1095 2450MHz – Head-2025.2.7 Appendix CReport No. : FA5O1503-01 Page:8/45 Dipole Verification Data> D2450V2, serial no. 1095 2450MHz – Head-2026.2.6 Appendix CReport No. : FA5O1503-01 Page:9/45 Appendix C Report No. : FA5O1503-01 Page:10/45 Appendix C Report No. : FA5O1503-01 Page:11/45 Appendix C Report No. : FA5O1503-01 Page:12/45 Appendix C Report No. : FA5O1503-01 Page:13/45 Appendix C Report No. : FA5O1503-01 Page:14/45 Appendix C Report No. : FA5O1503-01 Page:15/45

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Appendix C Report No. : FA5O1503-01 Page:40/45 Appendix C Report No. : FA5O1503-01 Page:41/45 Appendix C Report No. : FA5O1503-01 Page:42/45 Appendix C Report No. : FA5O1503-01 Page:43/45 Appendix C Report No. : FA5O1503-01 Page:44/45 Appendix C Report No. : FA5O1503-01 Page:45/45

Sporton International Inc.(Kunshan) Page Number : 1 of 23 TEL : +86-512-57900158 Report Issued Date : Apr. 24, 2026 FCC ID: 2A4DH-8573 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5O1503-01B FCC RF Test Report APPLICANT : Amazon.com Services LLC EQUIPMENT : Electronic Display Device MODEL NAME : Z8PC57 FCC ID : 2A4DH-8573 STANDARD : FCC Part 15 Subpart C §15.247 CLASSIFICATION : (DTS) Digital Transmission System TEST DATE(S) : Mar. 12, 2026 ~ Apr. 21, 2026 We, Sporton International Inc. (Kunshan), 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. (Kunshan), the test report shall not be reproduced except in full. Approved by: Jason Jia Sporton International Inc. (Kunshan) No. 1098, Pengxi North Road, Kunshan Economic Development Zone Jiangsu Province 215300 People’s Republic of China Sporton International Inc.(Kunshan) Page Number : 2 of 23 TEL : +86-512-57900158 Report Issued Date : Apr. 24, 2026 FCC ID: 2A4DH-8573 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5O1503-01B 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 ...........................................…

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