2BEXA-STULow temperature plasma sterilizer

8 The Green #11108, Dover, DE 19901 United States of America JNM GROUP INC. [email protected] * 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. U.S. Agent Designation for Service of Process - Certification Attestation Letter August 04, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Whom It May Concern: RE: CFR 47 §2.911 (d)(7) FCC US Agent Letter of Attestation - FCC ID: 2BEXA-STU - Applicant Company name : Plasmapp Co., Ltd Federal Registration Number (FRN) : 0034845545 Per section 2.911(d)(7) of the FCC rules, Plasmapp Co., Ltd (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. Designated agent* for service of process: Company Name: JNM GROUP INC. Physical U.S. Company Address: 8 The Green #11108, Dover, DE 19901, United States of America Agent name: Young Ju, Kim Agent Email Address: [email protected] Phone: +1 (302) 201-8886 FRN: 0035645514 The above contact person accepts the obligation for service of process. The applicant accepts 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. Applicant Signed: Designated Agent Signed: (Required, if different to Applicant): Signed: Signed: Printed name: Printed name: Young Ju, Kim Title: Title: Director Company Name: Company Name: JNM GROUP INC. Date: Lee JuHyung Head of RA Plasmapp Co., Ltd. August 4, 2026 Date: August 4, 2026 This designation is valid for one (1) year from the date of this letter.

Date: 8/3/2026 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(5) Attestation FCC ID: 2BEXA-STU 1. Plasmapp Co., Ltd. (“the applicant”) 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. 2. Plasmapp Co., Ltd. (“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. 3. Plasmapp 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 as an entity producing “covered” equipment and is not an affiliate or subsidiary of an entity identified on the Covered List. 4. Plasmapp Co., Ltd. (“the applicant”) certifies that, the device is not a router, robot, or inverter produced in a foreign country. Sincerely yours, Name: Juhyung Lee Job Title: Head of RA Company Name: Plasmapp Co., Ltd.

Date: 7/21/2026 Federal Communications Commission Equipment Authorization branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: I, the undersigned, hereby authorize UL Verification Services Inc. to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by UL Verification Services Inc. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby 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 because of a conviction for possession or distribution of a controlled substance. In authorizing UL Verification Services Inc. as our representative, we still recognize that we are responsible to: a) fulfill the requirements for the scope of certification requested, including implementing any appropriate changes requested by UL Verification Services Telecommunications Certification Body (TCB) and / or the FCC; b) supply any and all information needed for the evaluation of the products for which certification is sought; c) make claims regarding certification only in respect of the scope for which certification has been granted; d) not use our product certification in such a manner as to bring the TCB or FCC into disrepute and to not make any statement regarding product certification which the TCB or FCC may consider misleading or unauthorized; e) discontinue use of all advertising matter that contains any reference thereto and complies with any and all actions required by the FCC upon suspension or cancellation of certification; f) use certification only to indicate that products are certified in conformity with specified standards; g) endeavor to ensure that no certificate or report or any part thereof is used in a misleading manner, and any copies of the grants/certificates shall be reproduced in their entirety; h) comply with the requirements of the TCB and FCC, including the use of marks and label information prescribed for the scope of certification, when making reference to product certification in communication media such as documents, brochure or advertisements; i) comply with the requirements for certification, supply any information needed for evaluation of products to be certified and, where applicable, make provision for the participation of observers; j) ensure that products marketed under the scope of the requested certification continue to comply with the certification requirements; k) provide a sample of a production unit for testing within 30 days of the request should this product be selected as part of either the TCB’s or the FCC’s market surveillance requirements; l) keep a record of all complaints relating to product’s compliance with requirements of relevant standard; make records available to UL or FCC when requested; take appropriate action with respect to such complaints and any deficiencies found in the product that affect compliance with requirements for certification; document the actions taken with respect to complaints and/or deficiencies; m) inform the TCB immediately of any changes that may affect its ability to comply with the certification requirements. This authorization is valid until further written notice from the applicant. Sincerely Yours, Name: Juhyung Lee Job Title: Head of RA Company name: Plasmapp Co., Ltd.

CONFIDENTIALITY REQUEST Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: 7/21/2026 To Whom It May Concern Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, Plasmapp Co., Ltd. requests confidentiality for the following products: FCC ID: 2BEXA-STU The following exhibits contain trade secrets and proprietary information that could be of benefit to our competitors regarding the design of our product. This material is not customarily available to the general public and we request that it be withheld from public inspection. We request that the following information submitted be held permanent confidential treatment. Permanent Confidential Request • Schematic • Block Diagram • Operational description • Part List We request that the following information submitted be held short-term confidential treatment for 180 days. Short- term Confidential Request • Internal Photos • External Photos • Test-Setup Photos • User’s Manual If you have any questions, please feel free to contact me at the address shown below. Best regards, Name: Juhyung Lee Job Title: Head of RA Company name: Plasmapp Co., Ltd.

Date: 7/21/2026 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BEXA-STU To Whom It May Concern: We, Plasmapp Co., Ltd., hereby declare that the following products: Product Description: Low temperature plasma sterilizer Main Model Name: STERLINK U510 Variant Model Name(s): 510 There are no technical differences (including hardware, circuitry, and core functionality) between the models. The brand and model names are being updated solely in accordance with company policy, along with color variations. Sincerely, Sincerely yours, Name: Juhyung Lee Job Title: Head of RA Company Name: Plasmapp Co., Ltd.

4. Label and Location 4.1 Label [STERLINK U510] [510] 4.2 Label Location This label is permanently affixed to the back of the product and cannot be easily removed.

UL Korea, Ltd. Uiwang Laboratory 42, Obongsandan 1-ro, Uiwang-si, Gyeonggi-do, Republic of Korea RF Exposure / MPE Calculation Plasmapp Co., Ltd. declares that FCC ID: 2BEXA-STU complies with FCC radiation exposure requirement specified in the FCC Rule 2.1091 RF Exposure Compliance Requirement: The calculations in this document are based on the Limits for General Population / Uncontrolled Exposure contained in Table 1 of 47 CFR § 1.1310. Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (i) 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 (ii) 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 This calculation is based on the highest possible EIRP from the system, considering an uncontrolled exposure limit of 0.98 mW/cm² (180/f 2 ). RF Exposure Calculations: Maximum Electric field strength: 54.4 dBuV/m @ 3m Maximum EIRP: 54.4 dBuV/m – 95.2 = -40.8 dBm = 0.000083 mW 푆 = 푃 × 퐺 4 × 휋 × 푟 2 Where PG = 0.000083 mW (Maximum EIRP) r = 20 cm (Separation distance) Power Density Result S = 0.0000000165 mW/cm 2 Therefore, the transmitter complies with the RF exposure requirements, and SAR evaluation is not required.

13.56MHz NFC Antenna Specification Antenna Description Antenna Type Integral, PCB Loop Antenna Operation Frequency 13.56MHz Number of Turns 4 Turns Trace Width / Spacing 0.4mm/0.5mm Inductance 1.64 uH DC Resistance 0.79 Ohm VSWR < 2.0:1 @ 13.56MHz The NFC antenna was designed by Dreamtech. The antenna is formed by PCB traces and is integrated into the same PCB as the NFC circuitry. Since this communication feature operates through magnetic induction in a near-field environment, separate antenna gain information is not required. Antenna Dimensions Schematic Diagram of the Complete RF Section VSWR

CERTIFICATION TEST REPORT Report Number. : U-4792165153-FR1V3 Applicant : Plasmapp Co., Ltd. A-1005, 10F, 670, Daewangpangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13494, Republic of Korea Model : STERLINK U510 Derivative Model : 510 FCC ID : 2BEXA-STU EUT Description : Low temperature plasma sterilizer Test Standard(s) : FCC 47 CFR Part 15 Subpart C Date Of Issue: 2026-08-03 Prepared by: UL KOREA LTD. 26th floor, 152, Teheran-ro, Gangnam-gu Seoul, 06236, Korea Uiwang Test Site: UL Korea, Ltd. Uiwang Laboratory 42, Obongsandan 1-ro, Uiwang-si, Gyeonggi-do, Republic of Korea TEL: (031) 389-9603 FAX: (031) 462-8355 REPORT NO: U-4792165153-FR1V3 DATE: 2026-08-03 FCC ID: 2BEXA-STU Page 2 of 29 UL Korea, Ltd. Uiwang Laboratory FORM ID: FCC_15C(05) 42, Obongsandan 1-ro, Uiwang-si, Gyeonggi-do, Republic of Korea TEL: (031) 337-9902 FAX: (031) 213-5433 UL KOREA LTD. Confidential This report shall not be reproduced except in full, without the written approval of UL KOREA LTD. Revision History Rev. Issue Date Revisions Revised By V1 2026-07-22 Initial issue Jungi Shin V2 2026-07-29 Updated to address TCB`s question Jungi Shin V3 2026-08-03 Updated to address TCB`s question Jungi Shin REPORT NO: U-4792165153-FR1V3 DATE: 2026-08-03 FCC ID: 2BEXA-STU Page 3 of 29 UL Korea, Ltd. Uiwang Laboratory FORM ID: FCC_15C(05) 42, Obongsandan 1-ro, Uiwang-si, Gyeonggi-do, Republic of Korea TEL: (031) 337-9902 FAX: (031) 213-5433 UL KOREA LTD. Confidential This report shall not be reproduced except in full, without the written approval of UL KOREA LTD. TABLE OF CONTENTS 1. ATTESTATION OF TEST RESULTS ................................................................................. 4 2. TEST METHODOLOGY ..................................................................................................... 5 3. FACILITIES AND ACCREDITATION ................................................................................. 5 4. CALIBRATION AND UNCERTAINTY ................................................................................ 6 4.1. MEASURING INSTRUMENT CALIBRATION .............................................................. 6 4.2. SAMPLE CALCULATION ............................................................................................ 6 4.3. MEASUREMENT UNCERTAINTY ............................................................................... 6 4.4. DECISION RULE ......................................................................................................... 6 5. EQUIPMENT UNDER TEST ............................................................................................... 7 5.1. DESCRIPTION OF EUT .............................................................................................. 7 5.2. MAXIMUM E-FIELD STRENGTH ................................................................................ 7 5.3. MODE CONFIGURATION ........................................................................................... 7 5.4. DESCRIPTION OF TEST SETUP ................................................................................ 8 6. TEST AND MEASUREMENT EQUIPMENT ....................................................................... 9 7. TEST RESULTS SUMMARY .............................................................................................10 8. 20 dB BANDWIDTH ..........................................................................................................11 9. RADIATED EMISSION TEST RESULTS...........................................................................12 9.1. LIMITS AND PROCEDURE ........................................................................................12 9.2. FUNDAMENTAL AND SPURIOUS EMISSIONS (13.11 – 14.01 MHz) .......................14 9.2.1. EUT with passive TAG mode ...............................................................................14 9.2.2. EUT without passive TAG mode ..........................................................................16 9.3. SPURIOUS EMISSION 0.009 MHz TO 30 MHz ..........................................................18 9.3.1. EUT with passive TAG mode ...............................................................................18 9.3.2. EUT without passive TAG mode ..........................................................................20 9.4. SPURIOUS EMISSION 30 MHz TO 1000 MHz ...........................................................22 9.4.1. EUT with passive TAG mode ...............................................................................22 9.4.2. EUT without passive TAG mode ..........................................................................23 10. AC MAINS LINE CONDUCTED EMISSIONS ................................................................24 10.1. AC Power Line ........................................................................................................25 11. FREQUENCY STABILITY..............................................................................................29 REPORT NO: U-4792165153-FR1V3 DATE: 2026-08-03 FCC ID: 2BEXA-STU Page 4 of 29 UL Korea, Ltd. Uiwang Laboratory FORM ID: FCC_15C(05) 42, Obongsandan 1-ro, Uiwang-si, Gyeonggi-do, Republic of Korea TEL: (031) 337-9902 FAX: (031) 213-5433 UL KOREA LTD. Confidential This report shall not be reproduced except in full, without the written approval of UL KOREA LTD. 1. ATTESTATION OF TEST RESULTS COMPANY NAME: Plasmapp Co., Ltd. EUT DESCRIPTION: Low temperature plasma sterilizer MODEL NUMBER: STERLINK U510 DERIVATIVE MODEL: 510 SERIAL NUMBER: STJB4AM0003 DATE TESTED: 2026-06-26 ~ 2026-08-03 APPLICABLE STANDARDS STANDARD TEST RESULTS CFR 47 Part 15 Subpart C Complies UL KOREA LTD. tested the above equipment in accordance with the requirements set forth in the above standards. All indications of Pass/Fail in this report are opinions expressed by UL KOREA LTD. based on interpretations and/or observations of test results. Measurement Uncertainties were not taken into account and are publishe…

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