2BOGL-PT100MSTPocket Tester Transmitter Board

Merlos LLC 2106 Gardenia Drive Houston, TX 77018 Date: 08/28/25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BOGL-PT100MST Attestation Statements Part 2.911(d)(5)(i) Filing To whom it may concern, Merlos LLC, certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to the section 2.903 of the FCC rules. Merlos LLC 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, Signature: Kevin Merlos Owner

Merlos LLC 2106 Gardenia Drive Houston, TX 77018 Date: 08/28/25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BOGL-PT100MST Attestation Statements Part 2.911(d)(5)(ii) Filing To whom it may concern, Merlos LLC certifies that, as of the date of the filing of the application, Merlos LLC 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, Signature: Kevin Merlos Owner

Merlos LLC 2106 Gardenia Drive Houston, TX 77018 Date: 08/28/25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BOGL-PT100MST FRN: 0036845154 US Agent – Attestation Statement / Part 2.911(d)(7) To whom it may concern, Merlos LLC (“the applicant”) certifies that, as of the date of the filing of the application, Merlos LLC is our designated U.S. agent for service of process for the above referenced FCC ID. Merlos LLC 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. Merlos LLC accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: Merlos LLC FRN: 0036845154 Address: 2106 Gardenia Drive, Houston, TX 77018 Contact Person: Kevin Merlos Tel.: (713) 344-5979 Email: [email protected] Sincerely, Signature: Company: Merlos LLC Designated Agent: Merlos LLC Company Representative: Kevin Merlos Designated Agent Representative: Kevin Merlos Signature: Signature:

Merlos LLC 2106 Gardenia Drive Houston, TX 77018 Date: 08/28/25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BOGL-PT100MST Declaration of Authorization To whom it may concern, I, the undersigned, hereby authorize, Jandy So, of Waltek Testing Group (Shenzhen) Co., Ltd., (WALTEK) 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 Jandy So, of Waltek Testing Group (Shenzhen) Co., Ltd., (WALTEK) on our behalf shall have the same effects 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 853(a). This authorization is valid until further written notice from the applicant. Sincerely, Signature: Kevin Merlos Owner

Merlos LLC 2106 Gardenia Drive Houston, TX 77018 Date: 08/28/25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BOGL-PT100MST Confidentiality Request To whom it may concern, Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of the information accompanying this application as outlined below: ☒Block Diagram ☐Tune-Up Information ☒Operational Description ☐Security Information ☒Schematics ☐Software Defined Radio (SDR) Information ☒Parts List The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Signature: Kevin Merlos Owner

Reference No.: WTX25X03051954W Page 2 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EXHIBIT 2 - EUT EXTERNAL PHOTOGRAPHS EUT View 1 EUT View 2 Reference No.: WTX25X03051954W Page 3 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EUT View 3 EUT View 4 Reference No.: WTX25X03051954W Page 4 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EUT View 5 EUT View 6 Reference No.: WTX25X03051954W Page 5 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EUT View 7

Reference No.: WTX25X03051954W Page 1 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format Proposed Label Location on EUT FCC ID Label Location

Reference No.: WTX25X03051954W Page 1 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format Proposed Label Location on EUT FCC ID Label Location

Reference No.: WTX25X03051954W Page 6 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EXHIBIT 3 - EUT INTERNAL PHOTOGRAPHS EUT Housing and Board View 1 EUT Housing and Board View 2 Reference No.: WTX25X03051954W Page 7 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Solder Board-Component View 1 Solder Board-Component View 2 Reference No.: WTX25X03051954W Page 8 of 11 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Antenna View Antenna

1. RF Exposure Requirements 1.1 General Information Client Information Applicant: Merlos LLC Address of applicant: 2106 Gardenia Drive, Houston, TX, 77018 Manufacturer: Merlos LLC Address of manufacturer: 2106 Gardenia Drive, Houston, TX, 77018 General Description of EUT: Product Name: Pocket Tester Transmitter Board Trade Name: / Model No.: PT-100-MST Adding Model: / Rated Voltage: Type-C Port:DC5V Battery:DC3.7V Battery capacity: 1000mAh Power Adaptor: / FCC ID: 2BOGL-PT100MST Equipment Type: Mobile device Technical Characteristics of EUT: Frequency Range: 902.65MHz-927.35MHz Max. Field Strength: 93.25dBuV/m Modulation: ASK Quantity of Channels: / Channel Separation: / Antenna Type: PCB Antenna Antenna Gain: 0dBi 1.2 RF Exposure Exemption According to §1.1307(b)(3) and KDB 447498 D04 Interim General RF Exposure Guidance v01, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. Option A: FCC Rule Part 1.1307 (b)(3)(i)(A):The available maximum time-averaged power is no more than 1mW, regardless of separation distance. Option B: FCC Rule Part 1.1307 (b)(3)(i)(B): The available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold P th (mW) described in the following formula. P th is given by: Option C: FCC Rule Part 1.1307 (b)(3)(i)(C): The minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. R must be at least λ/2π, where λ is the free-space operating wavelength in meters. Single RF Sources Subject to Routine Environmental Evaluation RF Source frequency (MHz) Threshold ERP (watts) 0.3-1.34 1,920 R 2 1.34-30 3,450 R 2 /f 2 30-300 3.83 R 2 300-1,500 0.0128 R 2 f 1,500-100,000 19.2R 2 For Multiple RF sources: FCC Rule Part 1.1307(b)(3)(ii): (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). (B) In the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation. 1.3 Calculated Result Radio Access Technology Prediction Frequency Max. Field Strength Antenna Gain Output Power Tune-Up Power ERP (MHz) (dBuV/m) (dBi) (dBm) (dBm) (dBm) SRD 902.65 93.25 0 -2.01 -2.00 -4.15 Frequency Option Min. Distance Max. Power Exposure Limit Ratio Result (MHz) (cm) (dBm) (mW) (mW) Pass/Fail 902.65 B 0.5 -2.00 0.63 8.29 0.08 Pass Note: 1. EIRP= E-104.8+20logD; Output Power=EIRP- Antenna Gain; ERP=EIRP-2.15dB 2. Option A, B and C refers as clause 1.2. 3. For option B, Max (time-averaged power, effective radiated power (ERP)) converts to Max. Power. For option C, ERP converts to Max. Power; 4. For option B, P th (mW) converts to Exposure Limit (mW); For option C, ERP (W) converts to Exposure Limit (mW). 5. Ratio= Tune-Up ERP (mW)/ Exposure Limit (mW) Mode for Simultaneous Multi-band Transmission: Radio Access Technology Ratio 1 Ratio 2 Ratio 3 Simultaneous Ratio Limit Result Pass/Fail / / / / / / / Result: Pass

Size：64*0.7mm

Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 1 of 21 TEST REPORT Reference No. ................... : WTX25X09240812W FCC ID ............................... : 2BOGL-PT100MST Applicant .......................... : Merlos LLC Address ............................ : 2106 Gardenia Drive, Houston, TX, 77018 Manufacturer .................... : The same as Applicant Address ............................ : The same as Applicant Product Name .................. : Pocket Tester Transmitter Board Model No. .......................... : PT-100-MST Standards ......................... : 47 CFR FCC Part 15, Subpart B Date of Receipt sample ... : 2025-09-08 Date of Test....................... : 2025-09-08 to 2025-09-21 Date of Issue .................... : 2025-09-21 Test Report Form No. ...... : WTX_FCC PART15B_001 Test Result ........................ : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Email: [email protected] Tested by: Approved by: Mike Shi/Project Engineer Jason Su/Manager Reference No.: WTX25X09240812W Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 2 of 21 TABLE OF CONTENTS 1. GENERAL INFORMATION ................................................................................................................................... 4 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ............................................................................... 4 1.2 TEST STANDARDS ................................................................................................................................................... 5 1.3 TEST METHODOLOGY ............................................................................................................................................. 5 1.4 TEST FACILITY ....................................................................................................................................................... 5 1.5 EUT SETUP AND OPERATION MODE ...................................................................................................................... 6 1.6 MEASUREMENT UNCERTAINTY .............................................................................................................................. 7 1.7 TEST EQUIPMENT LIST AND DETAILS ..................................................................................................................... 8 2. SUMMARY OF TEST RESULTS ......................................................................................................................... 11 3. CONDUCTED EMISSIONS .................................................................................................................................. 12 3.1 TEST PROCEDURE ................................................................................................................................................. 12 3.2 BASIC TEST SETUP BLOCK DIAGRAM ................................................................................................................... 12 3.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................ 12 3.4 SUMMARY OF TEST RESULTS ............................................................................................................................... 12 4. RADIATED EMISSION ......................................................................................................................................... 15 4.1 TEST PROCEDURE ................................................................................................................................................. 15 4.2 BLOCK DIAGRAM OF TEST SETUP ........................................................................................................................ 15 4.3 TEST RECEIVER SETUP ......................................................................................................................................... 16 4.4 CORRECTED AMPLITUDE & MARGIN CALCULATION ............................................................................................ 16 4.5 ENVIRONMENTAL CONDITIONS ............................................................................................................................ 16 4.6 SUMMARY OF TEST RESULTS ............................................................................................................................... 16 APPENDIX PHOTOGRAPHS ................................................................................................................................... 21 Reference No.: WTX25X09240812W Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 3 of 21 Report version Version No. Date of issue Description Rev.00 2025-09-21 Original / / / Reference No.: WTX25X09240812W Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Page 4 of 21 1. GENERAL INFORMATION 1.1 Product Description for Equipment Under Test (EUT) General Description of EUT Product Name: Pocket Tester Transmitter Board Trade Name: / Model No.: PT-100-MST Adding Model(s): / Note: The test data is gathered from a production sample, provided by the manufacturer. Technical Characteristics of EUT Rated Voltage: Type-C Port:DC5V Battery:DC3.7V Battery Capacity: 1000mAh Rated Power: / Power Adapter Model: / Lowest Internal Frequency: 32MHz Highest Internal Frequency: 927.35MHz Classification of ITE: Class B Reference No.: WTX25X09240812W Waltek Testing Group (S…

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Reference No.: WTX25X09240812W Page 9 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn EXHIBIT 4 - TEST SETUP PHOTOGRAPHS Conducted Emission Test Setup Radiation Emission Test View (30MHz to 1GHz) Reference No.: WTX25X09240812W Page 10 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. Http://www.waltek.com.cn Radiation Emission Test View (Above 1GHz) ***** END OF REPORT *****