2BRSA-OFT2580Smart Tablet Computer

Smart Tablet Computer

Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: September 19, 2025 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: 2BRSA-OFT2580 Shenzhen Ying Keda Technology Co., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: Zhong Qinghao Title: Project Manager Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Tel.: 13144102563 Email: [email protected]

Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China 1 | P a g e Attestation Statements To: Federal Communications Commission Date: Sep. 19, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: [2BRSA-OFT2580] Product Name: [Smart Tablet Computer] This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name: Zhong Qinghao Title: Project Manager Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Tel.: 13144102563 Email: [email protected] Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☐ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. compliance ☐ The Memory used is limited to run the Cybersecurity or anti-virus software. compliance ☐ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. compliance ☐ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. compliance Device is not Inherent compliance ☒ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check SBOM (Software Bill of Materials) [For Device is not Inherent compliance] Section Component Name Version Supplier 1 Android 15 Google 2 3

Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China (September 19, 2025) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: 2BRSA-OFT2580 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below : ⎯ Block Diagram ⎯ Schematics ⎯ Operational Description ⎯ Tune-Up Procedure / Parts List ⎯ SOFTWARE SECURITY REQUIREMENTS FOR U-NII DEVICES ⎯ (Etc.) The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180) days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOM in the event information regarding the product or the product is made available to the public before the requested period has expired. ⎯ User Manual ⎯ Internal Photos ⎯ External Photos ⎯ Test Setup Photos ⎯ (Etc.) Sincerely, (Signature) Title: Project Manager Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Tel.: 13144102563 Email: [email protected]

Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: Sep. 19, 25 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: [2BRSA-OFT2580] [Shenzhen Ying Keda Technology Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, [HOPEK CORPORATION INC] (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts 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 it is our responsibility to inform the FCC whenever the agent information changes. [HOPEK CORPORATION INC] ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: HOPEK CORPORATION INC FRN: 0034562900 Address: 16755 Coyote Bush Dr Unit 84, San Diego, CA 92127 United States Signature: Contact Person: Peter Davis Tel: 561-235-6113 Email: [email protected] Applicant Company Name: Shenzhen Ying Keda Technology Co., Ltd. FRN: 0037416229 Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Signature: Contact Person: Zhong Qinghao Tel: 13144102563 Email: [email protected]

Shenzhen Ying Keda Technology Co., Ltd. Declaration Letter of Model Difference Date: 2025-09-09 FCC ID: 2BRSA-OFT2580 Tested Model Number: OFT2580 Adding Model Number(s): OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA All Adding Model Number(s) is/are same electrically identical as Tested Model Number. Only difference in model name. Yours Sincerely, Applicant: Shenzhen Ying Keda Technology Co., Ltd. Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Contact Person: Zhong Qinghao Tel.: 13144102563 Email: [email protected] Sincerely, Signature:

Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China (September 19, 2025) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2BRSA-OFT2580 I, the undersigned, hereby authorize (Shenzhen LGT Test Service Co., Ltd.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Shenzhen LGT Test Service Co., Ltd.)shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (Shenzhen Ying Keda Technology Co., Ltd.). We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) (Full name of contact person listed on FCC’s website) Zhong Qinghao (Title) Project Manager Tel: 13144102563 Fax: / Email: [email protected]

Page 1 of 5 Report No.: LGT25H075 Appendix - External Photographs of EUT Constructional Details Photo 1 Photo 2 Page 2 of 5 Report No.: LGT25H075 Appendix - External Photographs of EUT Constructional Details Photo 3 Photo 4 Page 3 of 5 Report No.: LGT25H075 Appendix - External Photographs of EUT Constructional Details Photo 5 Photo 6 Page 4 of 5 Report No.: LGT25H075 Appendix - External Photographs of EUT Constructional Details Photo 7 Photo 8 Page 5 of 5 Report No.: LGT25H075 Appendix - External Photographs of EUT Constructional Details Photo 9 Photo 10

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Page 1 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 1 Photo 2 Page 2 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 3 Photo 4 Wi-Fi ANT Page 3 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 5 Photo 6 Page 4 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 7 Photo 8 Page 5 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 9 Photo 10 Page 6 of 6 Report No.: LGT25H075 Appendix - Internal Photographs of EUT Constructional Details Photo 11 Photo 12

Page: 1/11 Ref : ACR.163.3.25.BES.B Cancel and replace the report ACR.163.3.25.BES.A SHENZHEN LGT TEST SERVICE CO., LTD. ROOM 205, BUILDING 13, ZONE B, ZHENXIONG INDUSTRIAL PARK, NO.177, RENMIN WEST ROAD, JINSHA, KENGZI STREET, PINGSHAN DISTRICT, SHENZHEN, GUANGDONG, CHINA MVG COMOSAR DOSIMETRIC E-FIELD PROBE SERIAL NO.: 2225-EPGO-450 Calibrated at MVG Z.I. de la pointe du diable Technopôle Brest Iroise – 295 avenue Alexis de Rochon 29280 PLOUZANE - FRANCE Calibration date: 06/06/2025 Accreditations #2-6789 Scope available on www.cofrac.fr The use of the Cofrac brand and the accreditation references is prohibited from any reproduction. Summary: This document presents the method and results from an accredited COMOSAR Dosimetric E-Field Probe calibration performed at MVG, using the CALIPROBE test bench, for use with a MVG COMOSAR system only. The test results covered by accreditation are traceable to the International System of Units (SI). COMOSAR E-Field Probe Calibration Report Docusign Envelope ID: D3677F92-510E-48FC-B182-CD820765136E COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.163.3.25.BES.B Page: 2/11 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Name Function Date Signature Prepared by : Pedro Ruiz Technical Manager 6/12/2025 Checked & approved by: Pedro Ruiz Technical Manager 6/12/2025 Authorized by: Kim Rutkowski Quality Manager Customer Name Distribution : SHENZHEN LGT TEST SERVICE CO., LTD. Issue Name Date Modifications A Pedro Ruiz 6/12/2025 Initial release B Pedro Ruiz 6/20/2025 Customer name & address Docusign Envelope ID: D3677F92-510E-48FC-B182-CD820765136E 6/23/2025 COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.163.3.25.BES.B Page: 3/11 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. TABLE OF CONTENTS 1 Device Under Test ..................................................................................................... 4 2 Product Description ................................................................................................... 4 2.1 General Information _______________________________________________________ 4 3 Measurement Method ................................................................................................ 4 3.1 Sensitivity _______________________________________________________________ 4 3.2 Linearity ________________________________________________________________ 5 3.3 Isotropy _________________________________________________________________ 5 3.4 Boundary Effect __________________________________________________________ 5 3.5 Probe Modulation Response _________________________________________________ 6 4 Measurement Uncertainty .......................................................................................... 6 5 Calibration Results ..................................................................................................... 6 5.1 Calibration in air __________________________________________________________ 6 5.2 Calibration in liquid _______________________________________________________ 7 6 Verification Results ................................................................................................... 8 7 List of Equipment .................................................................................................... 10 Docusign Envelope ID: D3677F92-510E-48FC-B182-CD820765136E COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.163.3.25.BES.B Page: 4/11 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. 1 DEVICE UNDER TEST Device Under Test Device Type COMOSAR DOSIMETRIC E FIELD PROBE Manufacturer MVG Model SSE2 Serial Number 2225-EPGO-450 Product Condition (new / used) New Frequency Range of Probe 0.15 GHz-7.5GHz Resistance of Three Dipoles at Connector Dipole 1: R1=0.226 M Dipole 2: R2=0.224 M Dipole 3: R3=0.229 M 2 PRODUCT DESCRIPTION 2.1 GENERAL INFORMATION MVG’s COMOSAR E field Probes are built in accordance to the IEC/IEEE 62209-1528 and FCC KDB865664 D01 standards. Figure 1 – MVG COMOSAR Dosimetric E field Probe Probe Length 330 mm Length of Individual Dipoles 2 mm Maximum external diameter 8 mm Probe Tip External Diameter 2.5 mm Distance between dipoles / probe extremity 1 mm 3 MEASUREMENT METHOD The IEC/IEEE 62209-1528 and FCC KDB865664 D01 standards provide recommended practices for the probe calibrations, including the performance characteristics of interest and methods by which to assess their effect. All calibrations / measurements performed meet the fore-mentioned standards. 3.1 SENSITIVITY The sensitivity factors of the three dipoles were determined using a two step calibration method (air and tissue simulating liquid) using waveguides as outlined in the standards for frequency range 600- 7500MHz and using the calorimeter cell method (transfer method) as outlined in the standards for frequency 150-450 MHz. Docusign Envelope ID: D3677F92-510E-48FC-B182-CD820765136E COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.163.3.25.BES.B Page: 5/11 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Probe vM This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it …

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The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Page 1 of 40 SAR TEST REPORT Product Name: Smart Tablet Computer Model Name: OFT2580, OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA FCC ID: 2BRSA-OFT2580 Issued For : Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT25H075HA02 Sample Received Date: Aug. 12, 2025 Date of Test Aug. 14, 2025 ~ Aug. 19, 2025 Date of Issue Aug. 20, 2025 Max. SAR (1g) Body:1.149 W/kg Reprot No.: LGT25H075HA02 Page 2 of 40 Table of Contents 1. General Information 5 1.1 EUT Description 5 1.2 Test Environment 6 1.3 Test Factory 6 2. Test Standards and Limits 7 3. SAR Measurement System 8 3.1 Definition of Specific Absorption Rate (SAR) 8 3.2 SAR System 8 4. Tissue Simulating Liquids 11 4.1 Simulating Liquids Parameter Check 11 5. SAR System Validation 13 5.1 Validation System 13 5.2 Validation Result 13 6. SAR Evaluation Procedures 14 7. EUT Antenna Location Sketch 15 7.1 SAR test exclusion consider table 16 8. EUT Test Position 18 9. Uncertainty 19 9.1 Measurement Uncertainty 19 9.2 System validation Uncertainty 20 10. Conducted Power Measurement 21 10.1 Test Result 21 10.2 Tune up Power 23 11. EUT and Test Setup Photo 24 11.1 EUT Photos 24 11.2 Setup Photos 27 12. SAR Result Summary 29 12.1 Body-worn SAR 29 12.2 Repeated SAR 29 12.3 Repeated SAR measurement 29 13. Equipment List 30 Appendix A. System Validation Plots 31 Appendix B. SAR Test Plots 37 Appendix C. Probe Calibration and Dipole Calibration Report 40 Reprot No.: LGT25H075HA02 Page 3 of 40 Revision History Rev. Issue Date Contents 00 Aug. 20, 2025 Initial Issue Reprot No.: LGT25H075HA02 Page 4 of 40 TEST REPORT CERTIFICATION Applicant Shenzhen Ying Keda Technology Co., Ltd. Address 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Manufacture Shenzhen Ying Keda Technology Co., Ltd. Address 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Product Name Smart Tablet Computer Trademark OyeFit Model Name OFT2580, OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA Sample number LGT2508137-7 APPLICABLE STANDARDS STANDARD TEST RESULTS ANSI/IEEE Std. C95.1-2019 FCC 47 CFR Part 2 (2.1093) IEEE 1528: 2013 PASS Prepared by: Approved by: Deng Deng Engineer Vita Li Manager Reprot No.: LGT25H075HA02 Page 5 of 40 1. General Information Environmental evaluation measurements of specific absorption rate (SAR) distributions in emulated human head and body tissues exposed to radio frequency (RF) radiation from wireless portable devices for compliance with the rules and regulations of the U.S. Federal Communications Commission (FCC). 1.1 EUT Description Product Name Smart Tablet Computer Trademark OyeFit Model Name OFT2580 Series Model OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA Model Difference Only difference in model name Device Category Portable Product stage Production unit RF Exposure Environment General Population / Uncontrolled Hardware Version N/A Software Version N/A Frequency Range WLAN 802.11b/g/n20/n40: 2412 MHz ~ 2462 MHz WLAN 802.11a/n20/n40/ac20/ac40/ac80: 5150 ~ 5250 MHz WLAN 802.11a/n20/n40/ac20/ac40/ac80: 5725 ~ 5850 MHz Max. Reported SAR(1g): (Limit:1.6W/kg) Test distance: Body:0mm Mode Body (W/kg) 2.4G WLAN 0.657 5.2G WLAN 0.446 5.8G WLAN 1.149 Limit 1.6W/kg Battery Rated Voltage:3.8V Capacity:5000mAh Operating Mode: 2.4G WLAN: 802.11b(DSSS): CCK, DQPSK, DBPSK 802.11g(OFDM): BPSK, QPSK,16-QAM,64-QAM 802.11n(OFDM): BPSK, QPSK,16-QAM,64 -QAM 5G WLAN: 802.11a(OFDM): BPSK, QPSK,16-QAM,64-QAM 802.11n(OFDM): BPSK, QPSK,16-QAM,64-QAM 802.11ac (OFDM): BPSK, QPSK,16-QAM,64-QAM,256-QAM Antenna Specification 2.4G WIFI: FPC Antenna 5.8G WIFI: FPC Antenna Operating Mode Maximum continuous output Hotspot Mode Not Support DTM Mode Not Support Reprot No.: LGT25H075HA02 Page 6 of 40 1.2 Test Environment Ambient conditions in the SAR laboratory: Items Required Temperature (°C) 18-25 Humidity (%RH) 30-70 1.3 Test Factory Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate FCC Registration No.: 746540 A2LA Certificate No.: 6727.01 IC Registration No.: CN0136 Reprot No.: LGT25H075HA02 Page 7 of 40 2. Test Standards and Limits No. Identity Document Title 1 47 CFR Part 2 Frequency Allocations and Radio Treaty Matters; General Rules and Regulations 2 ANSI/IEEE Std. C95.1-2019 IEEE Standard for Safety Levels with Respect to Human Exposure to Electric, Magnetic, and Electromagnetic Fields, 0 Hz to 300 GHz 3 IEEE Std. 1528-2013 Recommended Practice for Determining the Peak Spatial- Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques 4 FCC KDB 447498 D01 v06 Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies 5 FCC KDB 865664 D01 v01r04 SAR Measurement 100 MHz to 6 GHz 6 FCC KDB 865664 D02 v01r02 RF Exposure Reporting 7 FCC KDB 648474 D04 v01r03 SAR Eva…

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The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Page 1 of 70 RF TEST REPORT Product Name: Smart Tablet Computer Model Name: OFT2580, OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA FCC ID: 2BRSA-OFT2580 Issued For : Shenzhen Ying Keda Technology Co., Ltd. 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT25H075RF04 Sample Received Date: Aug. 12, 2025 Date of Test: Aug. 12, 2025 ~ Sep. 19, 2025 Date of Issue: Sep. 19, 2025 Report No.: LGT25H075RF04 Page 2 of 70 TEST REPORT CERTIFICATION Applicant: Shenzhen Ying Keda Technology Co., Ltd. Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Manufacturer: Shenzhen Ying Keda Technology Co., Ltd. Address: 3rd and 4th floors,No.88 Silian Xingwang Road,Henggang Street,Longgang District,Shenzhen City,Guangdong Province, China Product Name: Smart Tablet Computer Trademark: OyeFit Model Name: OFT2580 Series Model: OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA Sample Status: Normal APPLICABLE STANDARDS STANDARD TEST RESULTS FCC Part 15.247, Subpart C ANSI C63.10-2020 PASS Prepared by: Approved by: Zane Shan Vita Li Engineer Technical Director Report No.: LGT25H075RF04 Page 3 of 70 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 11 2.5 EQUIPMENTS LIST FOR ALL TEST ITEMS 12 3. EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 RADIATED EMISSION MEASUREMENT 18 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 28 4.1 LIMIT 28 4.2 TEST PROCEDURE 28 4.3 DEVIATION FROM STANDARD 28 4.4 TEST SETUP 28 4.5 EUT OPERATION CONDITIONS 28 4.6 TEST RESULTS 28 5. POWER SPECTRAL DENSITY TEST 29 5.1 LIMIT 29 5.2 TEST PROCEDURE 29 5.3 DEVIATION FROM STANDARD 29 5.4 TEST SETUP 29 5.5 EUT OPERATION CONDITIONS 29 5.6 TEST RESULTS 29 6. BANDWIDTH TEST 30 6.1 LIMIT 30 6.2 TEST PROCEDURE 30 6.3 DEVIATION FROM STANDARD 30 6.4 TEST SETUP 30 6.5 EUT OPERATION CONDITIONS 30 6.6 TEST RESULTS 30 Report No.: LGT25H075RF04 Page 4 of 70 7. PEAK OUTPUT POWER TEST 31 7.1 LIMIT 31 7.2 TEST PROCEDURE 31 7.3 DEVIATION FROM STANDARD 31 7.4 TEST SETUP 31 7.5 EUT OPERATION CONDITIONS 31 7.6 TEST RESULTS 31 8. ANTENNA REQUIREMENT 32 8.1 STANDARD REQUIREMENT 32 8.2 EUT ANTENNA 32 APPENDIX I - TEST RESULTS 33 DUTY CYCLE 33 MAXIMUM PEAK CONDUCTED OUTPUT POWER 38 -6DB BANDWIDTH 39 OCCUPIED CHANNEL BANDWIDTH 44 MAXIMUM POWER SPECTRAL DENSITY LEVEL 49 BAND EDGE 54 CONDUCTED RF SPURIOUS EMISSION 61 APPENDIX II - MEASUREMENT PHOTOS 70 Report No.: LGT25H075RF04 Page 5 of 70 Revision History Rev. Issue Date Revisions 00 Sep. 19, 2025 Initial Issue Report No.: LGT25H075RF04 Page 6 of 70 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted Band Edge Emission PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) 8N/A9 denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Report No.: LGT25H075RF04 Page 7 of 70 1.1 TEST FACTORY Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate: A2LA Certificate No.: 6727.01 FCC Registration No.: 746540 CAB ID: CN0136 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. Occupied Channel Bandwidth ±0.46% RF Output Power, Conducted ±0.71dB Power Spectral Density, Conducted ±1.57dB Unwanted Emission, Conducted ±0.63dB Conducted emission ±2.80dB All Emissions, Radiated (0.009-30MHz) ±2.16dB All Emissions, Radiated (30MHz-1GHz) ±4.61dB All Emissions, Radiated (1GHz-18GHz) ±5.49dB Temperature ±0.5∞C Humidity ±2% Duty Cycle ±2.3% Note: The measurement uncertainty is not included in the test result. Report No.: LGT25H075RF04 Page 8 of 70 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name: Smart Tablet Computer Trademark: OyeFit Test Model Name: OFT2580 Series Model: OFT2581, OFT2582, OFT2583, OFT2584, OFT2585, OFT2586, OFT2587, OFT2588, TG4ABG4WA Model Difference: Only difference in model name. Product Description: Operation Frequency: 802.11b/g/n(20MHz): 2412~2462MHz 802.11n(40MHz):2422~2452MHz Modulation Type: 802.11b(DSSS):CCK,DQPSK,DBPSK 802.11g(OFDM):BPSK,QPSK,16-QAM,64-QAM 802.11n(OFDM):BPSK,QPSK,16-QAM,64-QAM Number of Channel: 802.11b/g/n(20MHz): 11CH 802.11n(40MHz): 7CH Antenna Design…

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2 Antenna Test Report Address: Hongfenghua Internet Creative Park, No.1 Huangtian Gate Road, Hangcheng Street, Bao 'an District, Shenzhen Click here to add Add subheadin g C a p a ci ty Customer Name OyeFit Project Name T10 Commissio ning frequency band W/G/ B Structure mode FPC RF Engineer Cao Gong Structural Engineer Beam worker Antenna Type coaxial line + FPC Date 2025-08-11 Address: F3-005, Hongfenghua Internet Creative Park, No.1 Huangtian Gate Road, Hangcheng Street, Bao 'an District, Shenzhen Test environment Test Item Equipm ent 1. S parameters (S- parameter) 1. Return Loss (Return Loss) 2. Voltage standing wave ratio (VSWR) Network Analyzers: Agilent E5071B HP 8753D Active testing (Active) …

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