2BWXS-DP0266VIVA Tag

© 2026 4SEILS. All Rights Reserved. Proprietary. 1 CUSTOMER APPROVAL SHEET Company Name 4SEILS Co., Ltd. Product VIVA Tag Series Model DP0266 CUSTOMER APPROVAL □ APPROVAL FOR SPECIFICATIONS ONLY (Spec. Ver. 1.4) □ CUSTOMER REMARK: Issued By Checked By Approved By 4SEILS Co., Ltd. 904ho, 2497 Nambusunhwan ro, Seocho, Seoul, South Korea Tel: +82-2-585-4501 © 2026 4SEILS. All Rights Reserved. Proprietary. 2 VIVA Tag Datasheet VIVA Tag (Smart Electronic Information Label System) REV 1.4 2026-06-18 Summary This datasheet presents the general performance and specifications of VIVA Tag for ESL (Smart Electronic Information Label) System. © 2026 4SEILS. All rights reserved The names of actual companies and products mentioned herein may be the trademarks of their respective owners. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means without the express written consent of 4SEILS This document is subject to change without notice. © 2026 4SEILS. All Rights Reserved. Proprietary. 3 Table of Contents 1 General Description ____________________________________________________________ 5 1.1 Features _________________________________________________________________ 6 1.2 Typical Application _____________________________________________________ 6 1.3 Appearance _____________________________________________________________ 6 2 Specification ____________________________________________________________________ 7 2.1 Product Specification ___________________________________________________ 7 2.2 Radio (RF) Specification ________________________________________________ 8 2.3 NFC Specification _______________________________________________________ 8 2.4 Mechanical Drawing ____________________________________________________ 9 2.4.1 Case Dimension _________________________________________________________________ 9 2.5 Label Marking _________________________________________________________ 14 2.5.1 Serial Number Information ___________________________________________________ 14 2.5.2 Product and MAC Label _______________________________________________________ 15 3 Packaging _____________________________________________________________________ 17 4 Cautions for Treatment ______________________________________________________ 18 4.1 Usage Environment ___________________________________________________ 18 4.2 Storage and Use _______________________________________________________ 18 4.3 Cleaning _______________________________________________________________ 19 5 FCC Information to User _____________________________________________________ 20 © 2026 4SEILS. All Rights Reserved. Proprietary. 4 Document History REV Date Revision History Page 1.0 11-Dec-23 Initial release 1.1 24-Jun-24 Serial Number Revison, Adress change 1.2 02-Oct-24 DP1160 model added 1.3 24-Nov-25 DP0350, DP0370, DP0579 model added 1.4 18-Jun-26 Added FCC Compliance Statement © 2026 4SEILS. All Rights Reserved. Proprietary. 5 1 General Description VIVA Tag product is part of 4SEILS VIVA (Electronic Shelf Label) System, also consisting of VIVA Tag VIVA-AP (Gateway). The VIVA System electronically displays price, product, and promotion information on VIVA Tags, which has been traditionally printed or written on paper in places such as retail markets. VIVA Tag wirelessly receives data from Gateway and updates the display with the new information provided. VIVA Tag is based on 2.4Ghz General purpose RF for low power wireless communication applications. It consists of RF transceiver, RF circuitry and ARM Cortex M3, based network protocol, and MAC protocol and other peripheral devices. Figure 1. VIVA System © 2026 4SEILS. All Rights Reserved. Proprietary. 6 1.1 Features - Display: E-Paper Display (EPD) Active Type : 1.50”, 2.13”, 2.66”, 3.50”, 3.70”, 4.20”, 5.79”, 7.50”, 11.60” - Display Color: Mono type (Black, White), Red Color type (Black, White, Red), 4 Color type (Black, White, Red, Yellow) - Communication: Uses proprietary RF technology operating on the 2.4GHz band The 2.4GHz RF operates in the unlicensed ISM band - Low Power Consumption - Working Condition: Indoor where wireless communication is available. - NFC (13.56MHz): Felica ® NFC Forum Type 3 1.2 Typical Application - Retail industry with electronic displays, platforms, solutions, and services. - Intelligently communicating, managing, and optimizing price and product information. 1.3 Appearance Figure 2-1. Appearance © 2026 4SEILS. All Rights Reserved. Proprietary. 7 2 Specification 2.1 Product Specification Item Description Size & Weight 1.50 Inch : 38.0 x 47.8 x 11.7 mm (22.0g) 2.13 Inch : 69.4 x 35.3 x 11.7 mm (30.0g) 2.13 Inch (F) : 69.4 x 35.3 x 11.7 mm (25.0g) 2.66 Inch : 82.0 x 41.7 x 11.7 mm (38.0g) 2.66 Inch (F) : 82.0 x 41.7 x 11.7 mm (33.0g) 3.50 Inch : 102.2 x 50.9 x 11.7 mm (TBD) 3.70 Inch : 103.5 x 58.9 x 11.7 mm (TBD) 4.20 Inch : 97.8 x 91.8 x 12.6 mm (80.0g) 5.79 Inch : 165.1 x 64.8 x 12.5 mm (TBD) 7.50 Inch : 178.4 x 125.6 x 10.9 mm (200.0g) 11.60 Inch : 263.60 x 192.70 x 13.10 mm (455.0g) Battery CR2450 Li-MnO2 Battery (3V, 1~2pcs) - 1.50” : CR2450 x 1pcs - 2.13”, 2.66”, 2.90”, 3.50” : CR2450 x 2pcs Li-MnO2 Thin Cell CF502440, CP305050 - 2.13”F, 2.66”F, 3.70”, 4.20” : CF502440 x 1pcs - 5.79” : CF461983 x 1pcs - 7.50” : CP305050 x 1pcs - 11.60” : CF505050 x 1pcs ** Note: Battery capacity depends on temperature (especially in low temp environment) and number of update count. Display EPD Panel Display (Graphic type) BW : Black / White, BWR : Black / White / Red, BWRY : Black / White / Red / Yellow 1.50 Inch : 200 x 200 Pixel (188dpi) / 27.0 x 27.0 mm 2.13 Inch : 296 x 144 Pixel (155dpi) / 48.6 x 23.64 mm 2.66 Inch : 360 x 184 Pixel (152dpi) / 60.12 x 30.73 mm 3.50 Inch : 384 x 184 Pixel (122dpi) / 79.68 x 38.18 mm 3.70 Inch : 416 x 240 Pixel (130dpi) / 81.54 x 47.04 mm 4.20 Inch : 400 x 300 Pixel (120dpi) / 84.8 x 63.6 mm 5.79 Inch : 792 x 272 Pixel (144dpi) / 139.0 x 47.74 mm 7.50 Inch : 800 x 480 Pixel (124dp…

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Certification designating a U.S. Agent for service of process: As required by section 2.911(d)(7), the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. In either scenario, the designation of the U.S. agent for service of process should be provided as an attachment to the equipment authorization application. The applicant must provide a written certification, which must: i. Be signed by both the applicant and designated agent for service of process, if the agent is different from the applicant. ii. Acknowledge the applicant’s consent and the designated agent’s obligation to accept service of process. iii. Provide a physical U.S. address and email for the designated agent. iv. Acknowledge the applicant’s acceptance to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Unofficial information provided by FCC personnel on February 14, 2023, via the monthly call with the TCB Council: The Agent for Process of Service: • cannot be a TCB or affiliated with a TCB (e.g. could not be a person who works for a TCB or a company that owns or is owned by the TCB) • cannot be a [FCC recognised] Lab or affiliated with a test lab (e.g. could not be a person who works for a Lab or a company that owns or is owned by the Lab) • Agent can be Individual Entity or a Company Entity • Agent Entity must be located in US, US address/phone • Entity acting as Agent must have FRN (best practice, put FRN on Agent Letter) • Agent letter does not have to be FCC ID specific, can be general Agent for Grantee For devices being marketed or for which marketing has ceased for less than 1 year, if the Agent for Process of Service changes, then for every TC Number the TCB must request the FCC to put application into Audit Mode and Agent Letter needs to be updated (superseded). NOTE: The U.S. Agent for Service of Process should not be confused with the authorized agent used for signing the 731 form, other cover letters within the application, and/or the agent who may interface with the TCB. U.S. Agent Designation for Service of Process ATTENTION: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA REGARDING: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Approve-IT, Inc. Contact Name: Nathan Grinager Street Address: 8011 34 th Ave South, Suite 342 City/Province/Zip: Bloomington, MN 55425 Telephone No: 651-247-1678 Email: [email protected] FRN #: 0027533835 This letter is to confirm that we (“the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: July 20, 2026 Signed by (Printed Name/Title): Nathan Grinager / Co-President The Applicant confirms its explicit consent and acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: 4SEILS Co., Ltd. Grantee FRN: 0038629036 FCC ID: 2BWXS-DP0266 Contact Name: Hyeonjoon Ryu Street Address: 904ho, 2497 Nambusunhwan ro, Seocho City/Province/Zip: Seoul, South Korea Telephone No: +821049532838 Email: [email protected] Applicant Signature: Date: July 15, 2026 Signed by (Printed Name/Title): Hyeonjoon Ryu / CEO

Rev 1/26/2023 904ho, 2497 Nambusunhwan ro Seocho, Seoul South Korea Tel No : +82-10-4953-2838 Fax No : - Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2026-07-15 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BWXS-DP0266 4SEILS 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. 4SEILS Co., Ltd. certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Hyeonjoon ryu / CEO 4SEILS Co., Ltd. Rev 1/26/2023 904ho, 2497 Nambusunhwan ro Seocho, Seoul South Korea Tel No : +82-10-4953-2838 Fax No : - Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2026-07-15 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BWXS-DP0266 4SEILS 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. Sincerely, Hyeonjoon ryu / CEO 4SEILS Co., Ltd.

904ho, 2497 Nambusunhwan ro Seocho, Seoul South Korea Tel No : +82-10-4953-2838 Fax No : - Rev 11/20/07 Federal Communications Commission Authorization and Evaluation Division Date : 2026/07/15 Confidentiality Request regarding application for certification of FCC ID : 2BWXS-DP0266 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram Schematics Schematics_PCB Layout Parts List Operational Description Block Diagram.pdf Schematics.pdf Schematics_PCB Layout.pdf Part List.pdf Operational Description.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Hyeonjoon ryu / CEO 4SEILS Co., Ltd.

904ho, 2497 Nambusunhwan ro Seocho, Seoul South Korea Tel No : +82-10-4953-2838 Fax No : - Special Power of Attorney Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. Product/ Model Number: VIVA Tag / DP0266 I, Hyeonjoon ryu of 4SEILS Co., Ltd. hereby appoint Seong Uk Park of CTK Co., Ltd. to represent me to act on my behalf to do any and all of the following : Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The right, powers and authority in fact to exercise any and all of the rights and powers herein granted shell commence and be in full force from 2026/07/15 and continue to 2027/07/15 effective unless specifically terminated by either party. This authorization is limited to the product of as following: FCC ID: 2BWXS-DP0266 Date 2026/07/15, Sincerely,. Hyeonjoon ryu / CEO 4SEILS Co., Ltd.

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr EUT External Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr Label Photographs and Location Label

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr EUT Internal Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr SRD Antenna(TX/RX) NFC Antenna(RX) CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 www.elementkorea.kr Battery

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 Page 1 of 2 RF EXPOSURE EVALUATION FCC ID : 2BWXS-DP0266 Standard Requirement The following FCC Rule Parts and procedures are applicable : Part 1.1310 Radiofrequency radiation exposure limits Part 2.1091 Radiofrequency radiation exposure evaluation : Mobile device Table 1 below sets forth limits for Maximum Permissible Exposure (MPE) to radiofrequency electromagnetic fields. Table 1—Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposure 0.3-3.0 614 1.63 *100 6 3.0-30 1842/f 4.89/f *900/f 2 6 30-300 61.4 0.163 1.0 6 300-1,500 f/300 6 1,500-100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3-1.34 614 1.63 *100 30 1.34-30 824/f 2.19/f *180/f 2 30 30-300 27.5 0.073 0.2 30 300-1,500 f/1500 30 1,500-100,000 1.0 30 f = frequency in MHz * = Plane-wave equivalent power density CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 Page 2 of 2 MPE calculation S = EIRP / (4πR 2 ) Where S : Power density (mW/cm 2 ) EIRP : P + T + G (dBm) P : Maximum transmitter power (dBm) G : Antenna gain (dBi) R : distance to the centre of radiation of the antenna (cm) T : Power tolerance (dB) Safety distance(R) : 20 cm Mode Conducted Output power [dBm] Antenna Gain [dBi] Power tolerance [dB] Power density [mW/cm 2 ] Limit [mW/cm 2 ] GFSK -0.608 -2.25 + 1.5 0.000 1 1 Conclusion This confirms compliance to the required Radio frequency radiation exposure limit.

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (19) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 Test Setup: 1) For field strength of emissions from 9 kHz to 30 MHz 2) For field strength of emissions from 30 MHz to 1 GHz CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (20) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 3) For field strength of emissions above 1 GHz CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (21) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 Test results 1. 9 kHz to 30 MHz Test mode : Transmit, Middle Channel(Worst case) The requirements are: Complies Note : 1. The Unwanted emission was measured in the following position: EUT stand-up position(Z axis), lie- down position(X,Y axis). The worst emission was found in stand-up position(Z axis) and the worst case was recorded. 2. Result = Reading + c.f(correction factor) 3. Correction factor = Antenna factor + Cable loss + 6 dB attenuator * Reading data is the peak value. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (22) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 2. 30 MHz to 1 GHz The requirements are: Complies Test mode : Transmit, Middle Channel(Worst case) Test Data Remark : 1. The Unwanted emission was measured in the following position: EUT stand-up position(Z axis), lie- down position(X,Y axis). The worst emission was found in stand-up position(Z axis) and the worst case was recorded. 2. Result = Reading + c.f(Correction factor) 3. Correction factor = Antenna factor + Cable loss + 6 dB attenuator - Amp Gain * Reading data is the peak value. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (23) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 3. 2 310 MHz to 2 390 MHz The requirements are: Complies Test mode : Transmit, Low Channel(Worst case) 2310.002420.002325.002350.002375.002400.00 0 120 10 20 30 40 50 60 70 80 90 100 110 Frequency Level [MHz] [dB(uV/m)] Frequency [MHz] (P) Reading [dBuV] c.f [dB(1/m)] Level PK [dB(uV/m)] Level AV [dB(uV/m)] Limit PK [dB(uV/m)] Limit AV [dB(uV/m)] Margin PK [dB] Margin AV [dB] Note 2 343.4 H 52.3 -4.8 47.5 ----- 74.0 ----- 26.5 ----- Peak 2 380.7 H 37.8 -4.6 ----- 33.2 ----- 54.0 ----- 20.8 Average 2 358.6 V 51.7 -4.7 47.0 ----- 74.0 ----- 27.0 ----- Peak 2 366.0 V 37.9 -4.7 ----- 33.2 ----- 54.0 ----- 20.8 Average Remarks 1. The Unwanted emission was measured in the following position: EUT stand-up position(Z axis), lie- down position(X,Y axis). The worst emission was found in stand-up position(Z axis) and the worst case was recorded. 2. Result = Reading + c.f(correction factor) 3. Correction factor = Antenna factor + Cable loss - Amp Gain 4. Radiated Emission measured at 100 % duty cycle. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (24) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 4. 2 483.5 MHz to 2 500 MHz The requirements are: Complies Test mode : Transmit, High Channel_1 (Worst case) 2450.002500.002460.002470.002480.002490.00 0 120 10 20 30 40 50 60 70 80 90 100 110 Frequency Level [MHz] [dB(uV/m)] Frequency [MHz] (P) Reading [dBuV] c.f [dB(1/m)] Level PK [dB(uV/m)] Level AV [dB(uV/m)] Limit PK [dB(uV/m)] Limit AV [dB(uV/m)] Margin PK [dB] Margin AV [dB] Note 2 483.5 H 56.9 -4.2 52.7 ----- 74.0 ----- 21.3 ----- Peak 2 483.5 H 44.3 -4.2 ----- 40.1 ----- 54.0 ----- 13.9 Average 2 493.9 V 56.0 -4.1 51.9 ----- 74.0 ----- 22.1 ----- Peak 2 484.8 V 44.1 -4.2 ----- 39.9 ----- 54.0 ----- 14.1 Average Remarks 1. The Unwanted emission was measured in the following position: EUT stand-up position(Z axis), lie- down position(X,Y axis). The worst emission was found in stand-up position(Z axis) and the worst case was recorded. 2. Result = Reading + c.f(correction factor) 3. Correction factor = Antenna factor + Cable loss - Amp Gain 4. Radiated Emission measured at 100 % duty cycle. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (25) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 The requirements are: Complies Test mode : Transmit, High Channel_2 (Worst case) 2450.002500.002460.002470.002480.002490.00 0 120 10 20 30 40 50 60 70 80 90 100 110 Frequency Level [MHz] [dB(uV/m)] Frequency [MHz] (P) Reading [dBuV] c.f [dB(1/m)] Level PK [dB(uV/m)] Level AV [dB(uV/m)] Limit PK [dB(uV/m)] Limit AV [dB(uV/m)] Margin PK [dB] Margin AV [dB] Note 2 483.5 H 63.7 -4.2 59.5 ----- 74.0 ----- 14.5 ----- Peak 2 483.5 H 55.6 -4.2 ----- 51.4 ----- 54.0 ----- 2.6 Average 2 483.5 V 60.9 -4.2 56.7 ----- 74.0 ----- 17.3 ----- Peak 2 483.5 V 52.6 -4.2 ----- 48.4 ----- 54.0 ----- 5.6 Average Remarks 1. The Unwanted emission was measured in the following position: EUT stand-up position(Z axis), lie- down position(X,Y axis). The worst emission was found in stand-up position(Z axis) and the worst case was recorded. 2. Result = Reading + c.f(correction factor) 3. Correction factor = Antenna factor + Cable loss - Amp Gain 4. Radiated Emission measured at 100 % duty cycle. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-20…

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TEST REPORT CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (1) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 Verify the authenticity of this document using Blockchain Click the QR code or visit www.blockchain-verified.com 1. Applicant ◦ Name : 4SEILS Co., Ltd. ◦ Address : 904ho, 2497 Nambusunhwan ro, Seocho, Seoul, South Korea ◦ Date of Receipt : 2026-07-08 2. Manufacturer ◦ Name : 4SEILS Co., Ltd. 3. Use of Report : For FCC Certification 4. Test sample / Model : VIVA Tag / DP0266 5. Date(s) of test : 2026-07-08 to 2026-07-17 6. Test Standard (Method) used : FCC 47 CFR part 15 subpart C 15.247 7. Testing Environment : Refer to 7 page 8. Test Results : Compliance 9. Location of Test : Permanent Testing Lab On Site Testing Address : (Unhak-Dong) 5, 221beon-gil, Dongbu-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This report cannot be reproduced or copied without the written consent of CTK. Approval Tested by: Seong-uk Park (Signature) Technical Manager: Young-taek Lee (Signature) 2026-07-20 CTK Co., Ltd. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (2) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 REPORT REVISION HISTORY Date Revision Page No 2026-07-20 Issued (CTK-2026-01892) all This report shall not be reproduced except in full, without the written approval of CTK Co., Ltd. This document may be altered or revised by CTK Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by CTK Co., Ltd. will constitute fraud and shall nullify the document. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (3) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 CONTENTS 1. General Product Description ......................................................................................................................... 4 1.1 Applicant Information ............................................................................................................................ 4 1.2 Manufacturer Information ..................................................................................................................... 4 1.3 Product Information .............................................................................................................................. 4 1.4 Peripheral Devices ............................................................................................................................... 4 2. Accreditations ................................................................................................................................................ 5 2.1 Laboratory Accreditations and Listings ................................................................................................ 5 2.2 Calibration Details of Equipment Used for Measurement .................................................................... 5 3. Test Specifications ......................................................................................................................................... 6 3.1 Standards ............................................................................................................................................. 6 3.2 Mode of operation during the test......................................................................................................... 7 3.3 Measurement Uncertainty .................................................................................................................... 7 3.4 Test Software ........................................................................................................................................ 7 3.5 Testing Environment ........................................................................................................................... 7 4. Technical Characteristic Test ......................................................................................................................... 8 4.1 6dB Bandwidth & 99% Bandwidth ........................................................................................................ 8 4.2 Maximum peak Conducted Output Power ......................................................................................... 10 4.3 Power Spectral Density ...................................................................................................................... 12 4.4 Band Edge & Conducted Spurious emission ..................................................................................... 14 4.5 Radiated Emission ............................................................................................................................. 17 APPENDIX A – Test Equipment Used For Tests ............................................................................................. 28 CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-1551-9871 Fax: +82-31-624-9501 REPORT No.: CTK-2026-01892 Page (4) / (28) pages [EL-CTA-OP-X-KR-F-YS1506] Ver.06 Project Number: CTK-R-2026-03154 1. General Product Description 1.1 Applicant Information Company 4SEILS Co., Ltd. Contact Point 904ho, 2497 Nambusunhwan ro, Seocho, Seoul, South Korea Contact Person Name : Hyeonjoon Ryu E-mail : [email protected] Tel : +82-10-4953-2838 1.2 Manufacturer Information Manufacturer 4SEILS Co., Ltd. Address 904ho, 2497 Nambusunhwan ro, Seocho, Seoul, South Korea 1.3 Product Information FCC ID 2BWXS-DP0266 Product Description VIVA T…

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ART SIGNAL ANTENNA TOTAL SOLUTION ART SIGNAL Company _ Antenna Total Solution ( ART - S 2024) Ver.1 2020 ART SIGNAL Company _ Antenna Total Solution ( ART-S 2023) Ver.1 2021 4seils Smallinch ANT Photo & Dimesion ANT Photo ANT Dimension ART SIGNAL Company _ Antenna Total Solution ( ART-S 2024) Ver.1 2024 3D gain 1 2 3 4 5 6 Frequency [MHz] 2400 2420 2440 2460 2485 2500 Efficiency [dB] -6.65 -6.72 -6.85 -6.78 -7.03 -6.93 Efficiency [%] 21.6 21.3 20.7 21.0 19.8 20.3 Peak Gain [dB] -2.74 -2.74 -2.93 -2.75 -2.46 -2.25 Directivity [dB] 3.91 3.99 3.92 4.03 4.57 4.68 Minimum Gain [dB] -12.94 -13.51 -13.07 -12.30 -11.99 -11.44 4seils#1 266 ANT Test Data Picture VSWR ART SIGNAL Company _ Antenna Total Solution ( ART-S 2024) Ver.1 2024 2400 2420 2440 2460 2485 2500 3D Radiation Pattern 3D Radiation Pattern ART SIGNAL Company _ Antenna Total Solution ( ART-S 2024) Ver.1 2024 E5071B (Agilent) 8753ES (Agilent) Network Analyzer CTIA 3D OTA Chamber(A+Tech) Measurement Equipment…

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