WIYS1E4PRO001POS Terminal

CASTLES TECHNOLOGY CO., LTD. Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Date: November 17, 2025 Subject: Certifications concerning “covered” equipment pursuant to Part 2.911(d)(5)(i) and (ii) FCC ID: WIYS1E4PRO001 To whom it may concern, CASTLES TECHNOLOGY CO., LTD. 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. CASTLES TECHNOLOGY CO., LTD. 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. CASTLES TECHNOLOGY CO., LTD. further certifies that no 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 is installed in the equipment being certified. The above-referenced Covered List is published by the Public Safety and Homeland Security Bureau (PSHSB), pursuant to Section 1.50002 of the Commission’s rules. Sincerely, ________________________ Name: Evelyn Chen E-mail: [email protected]

CASTLES TECHNOLOGY CO., LTD. Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Date: November 17, 2025 Subject: Certifications concerning “covered” equipment pursuant to Part 2.911(d)(5)(i) and (ii) FCC ID: WIYS1E4PRO001 To whom it may concern, CASTLES TECHNOLOGY CO., LTD. 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. CASTLES TECHNOLOGY CO., LTD. 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. CASTLES TECHNOLOGY CO., LTD. further certifies that no 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 is installed in the equipment being certified. The above-referenced Covered List is published by the Public Safety and Homeland Security Bureau (PSHSB), pursuant to Section 1.50002 of the Commission’s rules. Sincerely, ________________________ Name: Evelyn Chen E-mail: [email protected]

CASTLES TECHNOLOGY CO., LTD. Date: November 17, 2025 Federal Communications Commission Office of Engineering and Technology Laboratory Division 7435 Oakland Mills Rd Columbia MD 21046-1609 Subject: Request for Confidentiality FCC ID: WIYS1E4PRO001 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. 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, ______________________ Name: Evelyn Chen E-mail: [email protected]

CASTLES TECHNOLOGY CO., LTD. Date: November 17, 2025 Power of Attorney To whom it may concern, Please be notified that I, Evelyn Chen, have designated Jim Tsai in Sporton International Inc. (Kunshan) as the person being responsible for this project and to sign the form 731 and other documentation. Any and all acts carried out in their professional capacity by Sporton International Inc. (Kunshan) on the matters of relating to all processes required in the FCC approval and any communication needed with the national authority, shall have the same legal authority as acts on our own behalf including the release of confidential information. We further certifies 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 1998, 21 U.S.C. 835(a). This authorization is limited to the product of as following: FCC ID: WIYS1E4PRO001 If you have any acknowledgement and response, please send it to Sporton International Inc. (Kunshan) directly. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely yours, Name: Evelyn Chen E-mail: [email protected]

1/1 CASTLES TECHNOLOGY CO., LTD. Date: November 17, 2025 Federal Communications Commission Authorization and Evaluation Division RE : Certification Application FCC ID : WIYS1E4PRO001 To Whom It May Concern, Pursuant to sections 0.457 and 0.459 of CFR 47, Public Notice DA 04-1705 of the Commission’s policy and to avoid premature release of sensitive information prior to marketing or release of the product to the public, the applicant requests the following documents contained in this certification application be temporarily withheld from public disclosure for an initial period of 180 days:  External Photos  Internal Photos  Test set-up photos  Users Manual The application contains technical information, which CASTLES TECHNOLOGY CO., LTD. deems to be trade secrets and proprietary. If made public, the information might be used to the disadvantage of the applicant in the market place. The Applicant understands that pursuant to Rule 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application Sincerely, Name: Evelyn Chen E-mail: [email protected]

Date: 2025-10-28 System Check_Head_13MHz DUT: CLA-13 - SN1020 Communication System: CW; Frequency: 13.000 MHz; Duty Cycle: 1:1 Medium: HSL Medium parameters used: f= 13.000 MHz; σ= 0.745 S/m; ε r = 56.2 Ambient Temperature: 23.3°C; Liquid Temperature: 22.6°C DASY6 Configuration: - Probe: EX3DV4 - SN7706; ConvF(16.06, 16.97, 16.03); Calibrated: 2025-05-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1358; Calibrated: 2025-07-15 - Phantom: ELI V8.0 (20deg probe tilt); Serial: 2135; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Pin=1000mW/Area Scan (40.0 mm x 90.0 mm): Measurement Grid: 10.0 mm x 15.0 mm SAR (1g) = 0.534 W/kg; SAR (10g) = 0.353 W/kg; Pin=1000mW/Zoom Scan (32.0 mm x 32.0 mm x 30.0 mm): Measurement Grid: 6.0 mm x 6.0 mm x 1.5 mm Power Drift = -0.03 dB SAR (1g) = 0.525 W/kg; SAR (10g) = 0.316 W/kg Smallest distance from peaks to all points 3 dB below = 13.2 mm Ratio of SAR at M2 to SAR at M1 = 76.3 % Appendix AReport No. : FA593093A Page:1/1

Date: 2025-10-28 01_NFC_ASK_Front_0mm Communication System: CW; Frequency: 13.600 MHz; Duty Cycle: 1:1 Medium: HSL Medium parameters used: f= 13.600 MHz; σ= 0.745 S/m; ε r = 56.2 Ambient Temperature: 23.3°C; Liquid Temperature: 22.6°C DASY6 Configuration: - Probe: EX3DV4 - SN7706; ConvF(16.06, 16.97, 16.03); Calibrated: 2025-05-22 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1358; Calibrated: 2025-07-15 - Phantom: ELI V8.0 (20deg probe tilt); Serial: 2135; Section: Flat - Measurement Software: 16.4.0.5005 - UID: CW, 0-- Area Scan (120.0 mm x 210.0 mm): Measurement Grid: 15.0 mm x 15.0 mm SAR (1g) = 0.108 W/kg; SAR (10g) = 0.082 W/kg; Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 6.0 mm x 6.0 mm x 1.5 mm Power Drift = 0.01 dB SAR (1g) = 0.109 W/kg; SAR (10g) = 0.056 W/kg Smallest distance from peaks to all points 3 dB below = 9.6 mm Ratio of SAR at M2 to SAR at M1 = 64.3 % Appendix BReport No. : FA593093A Page:1/1

Appendix C Report No. : FA593093A Page:1/34 Appendix C Report No. : FA593093A Page:2/34 Appendix C Report No. : FA593093A Page:3/34 Appendix C Report No. : FA593093A Page:4/34 Appendix C Report No. : FA593093A Page:5/34 Appendix C Report No. : FA593093A Page:6/34 Appendix C Report No. : FA593093A Page:7/34 Appendix C Report No. : FA593093A Page:8/34 Appendix C Report No. : FA593093A Page:9/34 Appendix C Report No. : FA593093A Page:10/34 Appendix C Report No. : FA593093A Page:11/34 Appendix C Report No. : FA593093A Page:12/34 Appendix C Report No. : FA593093A Page:13/34 Appendix C Report No. : FA593093A Page:14/34 Appendix C Report No. : FA593093A Page:15/34 Appendix C Report No. : FA593093A Page:16/34 Appendix C Report No. : FA593093A Page:17/34 Appendix C Report No. : FA593093A Page:18/34 Appendix C Report No. : FA593093A Page:19/34 Appendix C Report No. : FA593093A Page:20/34 Appendix C Report No. : FA593093A Page:21/34 Appendix C Report No. : FA593093A Page:22/34 Appendix C Report No. : FA593093A Page:23/34 Appendix C Report No. : FA593093A Page:24/34 Appendix C Report No. : FA593093A Page:25/34 Appendix C Report No. : FA593093A Page:26/34 Appendix C Report No. : FA593093A Page:27/34

Appendix C Report No. : FA593093A Page:28/34 Appendix C Report No. : FA593093A Page:29/34 Appendix C Report No. : FA593093A Page:30/34 Appendix C Report No. : FA593093A Page:31/34 Appendix C Report No. : FA593093A Page:32/34 Appendix C Report No. : FA593093A Page:33/34 Appendix C Report No. : FA593093A Page:34/34

Sporton International Inc. (Kunshan) Page : 1 of 26 TEL : +86-512-57900158 Issued Date : Nov. 10, 2025 FCC ID : WIYS1E4PRO001 Form version : 200414 FCC SAR Test Report Report No. : FA593093A FCC SAR TEST REPORT APPLICANT : CASTLES TECHNOLOGY CO., LTD. EQUIPMENT : POS Terminal BRAND NAME : MODEL NAME : S1E4 PRO FCC ID : WIYS1E4PRO001 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 26 TEL : +86-512-57900158 Issued Date : Nov. 10, 2025 FCC ID : WIYS1E4PRO001 Form version : 200414 FCC SAR Test Report Report No. : FA593093A 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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QD0020 T1.0 Antenna Product Specification Entry Name S1E4pro Frequency Channel NFC:13.56Mhz Supplier Name INNOWAVE Supplier Address Building H, Jintu Zhizao Garden, No. 55 Shengchuang Road, Yushan Town, Kunshan City, Jiangsu Province Test Personnel Name NFC Antenna position： 68.1*62.49*6.5mm NFC ANT Type：LOOP

Sporton International Inc. (Kunshan) Page Number : 1 of 20 TEL : +86-512-57900158 Report Issued Date : Oct. 31, 2025 FCC ID: WIYS1E4PRO001 Report Version : Rev. 01 Report Template No.: BU5-FR15CNFC Version 2.0 FCC RF Test Report Report No. : FR593093 FCC RF Test Report APPLICANT : CASTLES TECHNOLOGY CO., LTD. EQUIPMENT : POS Terminal BRAND NAME : MODEL NAME : S1E4 PRO FCC ID : WIYS1E4PRO001 STANDARD : FCC Part 15 Subpart C §15.225 CLASSIFICATION : (DXX) Low Power Communication Device Transmitter TEST DATE(S) : Oct. 14, 2025 ~ Oct. 21, 2025 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 20 TEL : +86-512-57900158 Report Issued Date : Oct. 31, 2025 FCC ID: WIYS1E4PRO001 Report Version : Rev. 01 Report Template No.: BU5-FR15CNFC Version 2.0 FCC RF Test Report Report No. : FR593093 TABLE OF CONTENTS TABLE OF CONTENTS ............................................................................................................................................... 2 REVISION HISTORY .................................................................................................................................................... 3 SUMMARY OF THE TEST RESULT ........................................................................................................................... 4 1. GENERAL DESCRIPTION ...................................................................................................................................... 5 1.1 Applicant ......................................................................................................................................................................... 5 1.2 Manufacturer .................................................................................................................................................................. 5 1.3 Product Feature of Equipment Under Test ..................................................................................................................... 5 1.4 Product Specification of Equipment Under Test ............................................................................................................. 5 1.5 Modification of EUT ........................................................................................................................................................ 6 1.6 Testing Location ............................................................................................................................................................. 6 1.7 Test Software ................................................................................................................................................................. 6 1.8 Applicable Standards...................................................................................................................................................... 6 2. TEST CONFIGURATION OF EQUIPMENT UNDER TEST .................................................................................... 7 2.1 Descriptions of Test Mode .............................................................................................................................................. 7 2.2 Connection Diagram of Test System .............................................................................................................................. 7 2.3 Table for Supporting Units .............................................................................................................................................. 8 2.4 EUT Operation Test Setup ............................................................................................................................................. 8 3. TEST RESULTS ....................................................................................................................................................... 9 3.1 AC Power Line Conducted Emissions Measurement ..................................................................................................... 9 3.2 20dB and 99% OBW Spectrum Bandwidth Measurement ............................................................................................ 11 3.3 Frequency Stability Measurement ................................................................................................................................ 12 3.4 Field Strength of Fundamental Emissions and Mask Measurement ............................................................................. 13 3.5 Radiated Emissions Measurement ............................................................................................................................... 15 3.6 Antenna Requirements ................................................................................................................................................. 18 4. LIST OF MEASURING EQUIPMENT .................................................................................................................... 19 5. UNCERTAINTY OF EVALUATION ....................................................................................................................... 20 APPENDIX A. TEST RESULTS OF CONDUCTED EMISSION TEST APPENDIX B. TEST RESULTS OF CONDUCTED TEST ITEMS B1. Test Result of 20dB Spectrum Bandwidth B2. Test Result of Frequency Stability APPENDIX C. TEST RESULTS OF RADIATED TEST ITEMS C1. Test Result of Field Strength of Fundamental Emiss…

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