2BTDM-MWST-110RF Bell

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every TC Number the TCB must request the FCC to put application into Audit Mode and Agent Letter needs to be updated (superseded).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. MPIA CO., LTD. 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: December 11, 2025 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: MPIA CO., LTD. Grantee FRN: 0037688512 Grantee Code: 2BTDM Contact Name: Jang chanson Street Address: 203-701, 388 Songnae-daero, Wonmi-gu, City/Province/Zip: Bucheon-si, Gyeonggi-do, South Korea 14502 Telephone No: +82-32-666-8191 Email: [email protected] Applicant Signature: Date: December 11, 2025 Signed by (Printed Name/Title): Jang chanson / Principal research engineer

MPIA CO., LTD. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: MPIA CO., LTD. Address: 203-701, 388 Songnae-daero, Wonmi-gu, Bucheon-si, Gyeonggi-do, 14502, South Korea Product Name: RF Bell FCC ID: 2BTDM-MWST-110 Model(s): MWST-110 2.911(d)(5)(i) Equipment Type We, MPIA CO., LTD. (“the applicant”) certify that the equipment for which authorization is sought through certification is not: • Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules. • Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Jang chanson Date: April 16, 2026 Title and Company name: Principal research engineer / MPIA CO., LTD. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

MPIA CO., LTD. 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: MPIA CO., LTD. Address: 203-701, 388 Songnae-daero, Wonmi-gu, Bucheon-si, Gyeonggi-do, 14502, South Korea Product Name: RF Bell FCC ID: 2BTDM-MWST-110 Model(s): MWST-110 2.911(d)(5)(ii) Applicant filing We, MPIA CO., LTD. (“the applicant”) certify that, as of the date of the filing of the application, the applicant is is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Jang chanson Date: April 16, 2026 Title and Company name: Principal research engineer / MPIA CO., LTD. NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Letter of Authorization Company: MPIA CO., LTD. Address: 203-701, 388 Songnae-daero, Wonmi-gu, Bucheon-si, Gyeonggi-do, 14502, South Korea Product Name: RF Bell Model Number: MWST-110 FCC Identifier: 2BTDM-MWST-110 We authorize MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: Jang chanson Date: April 16, 2026 Title: Principal research engineer Signature of applicant:

MPIA CO., LTD. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 16, 2026 Subject; Request for Confidentiality FCC ID: 2BTDM-MWST-110 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jang chanson Title: Principal research engineer

FCC ID : 2BTDM-MWST-110 Page 1 of 1 RF exposure FCC ID : 2BTDM-MWST-110 According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100 ㎒ to 6 ㎓ at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(㎓)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, Where; f(㎓) is the RF channel transmit frequency in ㎓ Power and distance are rounded to the nearest ㎽ and mm before calculation The result is rounded to one decimal place for comparison Results Mode Frequency (㎓) Distance (mm) Max tune-up power (㏈m) Calculation value Exclusion Threshold (㏈m) (㎽) DTS 0.920 7 5 -10.0 0.10 0.019 ≤3.0

TEST REPORT Report No. : KES-RF250737-R1 Page1/25 KES Co., Ltd. #3002, #3503, #3701, 40, Simin-daero365beon-gil, Dongan-gu, Anyang-si,Gyeonggi-do, 14057, Republic ofKorea Tel : +82-31-425-6200, Fax : +82-31-341-3838 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on our website (www.kes.co.kr). FCC TEST REPORT 1. Client ○ Name : MPIA Co., Ltd. ○ Address : 203-701, 388 Songnae-daero, Wonmi-gu Bucheon-si, Gyeonggi-do South Korea 2. Sample Description ○ Product item : RF BELL ○ Model name : MWST-110 ○ Manufacturer etc. : MPIA Co., Ltd. 3. Date of test :2025.12.30 ~ 2026.01.02 4. Location of Test :Permanent Testing LabOn Site Testing ○ Address : 473-21, Gayeo-ro, Yeoju-si, Gyeonggi-do, 12658, Rep. of Korea 5. Test method used :Part 15 Subpart C 15.247 6. Test result :PASS The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced and copied without permission without the written consent of KES Co., Ltd. This laboratory is not accredited for the test results marked *. This test report is not related to KOLAS accreditation. Affirmation Tested byTechnical Manager Name : Myeong-Ho, Lee(Signature) Name : Yeong-Jun Cho(Signature) 2026 . 05. 22. KES Co., Ltd. Report No. : KES-RF250737-R1 Page2/25 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on our website (www.kes.co.kr). REPORT REVISION HISTORY DateTest Report No.Revision History 2026.03.31KES-RF250737Initial 2026.05.22KES-RF250737-R1 Correction of Client Address (page.1,4) Correction of Test site Address (page.1,4) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. This document may be altered or revised by KES Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by KES Co., Ltd. will constitute fraud and shall nullify the document. Report No. : KES-RF250737-R1 Page3/25 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on our website (www.kes.co.kr). TABLE OF CONTENTS 1.General information ................................................................................................................................... 4 1.1.EUT description .......................................................................................................................... 4 1.2.Test configuration........................................................................................................................ 4 1.3.Information about variant model ................................................................................................. 5 1.4.Accessory information ................................................................................................................ 5 1.5.Device modifications................................................................................................................... 5 1.6.Sample calculation ..................................................................................................................... 5 1.7.Measurement Uncertainty .......................................................................................................... 5 1.8.Frequency/channel operations ................................................................................................... 5 2.Summary of tests ....................................................................................................................................... 6 3.Test results .............................................................................................................................................. 7 3.1.6㏈bandwidth .......................................................................................................................... 7 3.2.Output power .............................................................................................................................. 9 3.3.Power spectral density ..............................................................................................................11 3.4.Radiated restricted band and emissions .................................................................................. 13 3.5.Conducted spurious emissions & band edge ........................................................................... 22 3.6.Antenna Requirement............................................................................................................... 24 Appendix A. Measurement equipment.......................................................................................................... 25 Report No. : KES-RF250737-R1 Page4/25 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on our website (www.kes.co.kr). 1.General information Applicant:MPIA Co., Ltd. Applicant address:203-701, 388 Songnae-daero, Wonmi-gu Bucheon-si, Gyeonggi-do South Korea Test site:KES Co., Ltd. Test site address:#3002, #3503, #3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Republic of Korea 473-21, Gayeo-ro, Yeoju-si, Gyeonggi-do, 12658, Rep. of Korea Test FacilityFCC Accreditation Designation No.: KR0100, Registration No.: 444148 FCC rule part(s):15.247 FCC ID:2BTDM-MWST-110 Test device serial No.:ProductionPre-productionEngineering 1.1.EUT description Equipment under testRF BELL Frequency range & Number of channels 920.7㎒: 1 ch ModelMWST-110 Modulation techniqueGFSK Antenna specification WIRE Antenna // Peak gain: -7.24㏈i Power sourceDC 3.0 V H/W versionver2.0 F/W versionver2.0 1.2.Test configuration TheMPIA Co., Ltd. // RF BELL // MWST-110 // FCC ID: 2BTDM-MWST-110was tested according to the specification of EUT, the EUT must comply with following standards and KDB documents. FCC Part 15.247 KDB 558074 D01 v05 r02 ANSI C63.10-2020 Report No. : KES-RF250737-R1 Page5/25 KES-QP16-F01(00-23…

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FCC ID : 2BTDM-MWST-110Page 1 of 1 Radiated test Blank Conducted test