2AHU2-ACTH25REMThermostat remote (BT)

ASA Electronics Shenzhen Limited Covered Equipment Certification Attestation Letter 1/16/2026 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2AHU2-ACTH25REM ASA Electronics Shenzhen Limited 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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. ASA Electronics Shenzhen Limited 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. ASA Electronics Shenzhen Limited (“the applicant”) certifies that the equipment for which authorization issought 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 oranti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Thomas Leung Title: Manager Company Name: ASA Electronics Shenzhen Limited Date: 1/16/2026

ASA Electronics Shenzhen Limited * 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 February 2, 2026 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2AHU2-ACTH25REM Per section 2.911(d)(7) of the FCC rules, ASA Electronics Shenzhen Limited (“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: ASA ELECTRONICS Physical U.S. Company Address: 2602 MARINA DRIVE, ELKHART, IN 46514, United States Agent name: Brent Barrow Agent Email Address: [email protected] FRN: 0022690382 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: Designated Agent Signed: (Required, if different to Applicant): Signed: Signed: Printed name: Thomas Leung Printed name: Brent Barrow Title: Click here to enter text. Title: President Company Name: ASA Electronics Shenzhen Limited Company Name: ASA ELECTRONICS Date: January 16, 2026 Date: January 16, 2026 FRN Code: 0025445636 FRN Code: 0022690382

ASA Electronics Shenzhen Limited February 2, 2026 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 REQUEST FOR CONFIDENTIALITY - FCC FCC ID: 2AHU2-ACTH25REM Pursuant to Sections 0.457(d) and 0.459 of the Commission’s Rules and FCC Guidance document 726920, we hereby request permanent confidential treatment of exhibits identified as such in the table below and request they are permanently withheld from public review based on the documents containing trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. We also request short-term confidentiality on certain exhibits until the intended date of marketing as outlined below. We request the exhibits be withheld from public view for a period of 180 days. We attest marketing of the product will only commence after the period of short-term confidentiality expires, or if marketing is to commence before the requested number of days listed above, the grantee will inform Nemko to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. Exhibit Type of Confidentiality Requested Block Diagrams ☒ Permanent ☐ Short Term External Photos ------------------ ☒ Short Term Internal Photos ☐ Permanent* ☒ Short Term Operation Description ☒ Permanent ☐ Short Term Parts List & Placement/BOM ☒ Permanent ☐ Short Term Tune-Up Procedure ☐ Permanent ☐ Short Term Schematic Diagrams ☒ Permanent ☐ Short Term Test Setup Photos ------------------ ☒ Short Term User’s Manual ☐ Permanent* ☒ Short Term The asterisked items (*) require further information to be provided in this justification letter before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. Note: any documents held under the Short-Term confidentiality will automatically become public after the requested time if an appropriate extension request has not been received. Any exhibits (i.e., schematic diagrams) that may have already been requested to have “Permanent” confidentiality as shown above need not be repeated under Short-Term confidentiality request. Sincerely, Signed: Printed name: Thomas Leung Title: Manager Company Name: ASA Electronics Shenzhen Limited

DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 www.dekra-certification.com Report no.: External photo Page 1 / 1 Label FCC ID Label location

DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 https://www.dekra.com Report no.: RF Exposure Page 1 / 11 Test report No: RF Exposure TEST REPORT Radio Spectrum Matters (RF) Identification of item tested Thermostat remote (BT) Trademark Advent Air Model and /or type reference ACTH25REM FCC ID 2AHU2-ACTH25REM Features Battery”AAA”: 1.5 V*2=3 V Applicant ́s name / address ASA Electronics Shenzhen Limited Room 503, 5/F., Unit A, Skyworth Building, Gaoxin Avenue.1.s., Nanshan District, Shenzhen, Guangdong, China. Test method requested, standard KDB 447498 D01V06 FCC Part 1.1310 Verdict Summary COMPLIANCE Tested by (name & signature) Jazz Liang Approved by (name & signature) Tim Yan Date of issue 2026-01-15 Report template No TRF_EMC 2017-06- FCC_Exposure DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 https://www.dekra.com Report no.: RF Exposure Page 2 / 11 INDEX page General conditions ...................................................................................................................................................... 3 Uncertainty .................................................................................................................................................................. 3 Environmental conditions............................................................................................................................................ 3 Possible test case verdicts ......................................................................................................................................... 3 Definition of symbols used in this test report .............................................................................................................. 4 Abbreviations .............................................................................................................................................................. 4 Document History ....................................................................................................................................................... 4 Remarks and Comments ............................................................................................................................................ 4 1 General Information ........................................................................................................................................... 5 1.1 General Description of the Item(s) .......................................................................................................... 5 1.2 Test data ................................................................................................................................................. 8 1.3 The environment(s) in which the EUT is intended to be used ................................................................ 8 2 Description of Test Setup .................................................................................................................................. 9 2.1 Operating mode(s) used for tests............................................................................................................ 9 2.2 Support / Auxiliary equipment / unit / software for the EUT .................................................................... 9 2.3 Test Configuration / Block diagram used for tests .................................................................................. 9 3 RF Exposure Evaluation .................................................................................................................................. 10 3.1 Limits ..................................................................................................................................................... 10 3.2 Test Procedure ...................................................................................................................................... 11 3.3 Test Result ............................................................................................................................................ 11 DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 https://www.dekra.com Report no.: RF Exposure Page 3 / 11 GENERAL CONDITIONS 1. This report is only referred to the item that has undergone the test. 2. This report does not constitute or imply on its own an approval of the product by the Certification Bodies or Competent Authorities. 3. This document is only valid if complete; no partial reproduction can be made without previous written permission of DEKRA. 4. This test report cannot be used partially or in full for publicity and/or promotional purposes without previous written permission of DEKRA. 5. This report will not be used for social proof function in China market. UNCERTAINTY For all measurements where guidance for the calculation of the instrumentation uncertainty of a measurement is specified in EN 55016-4-2 (CISPR 16-4-2), EN/IEC 61000-4 series or a product standard, the measurement instrumentation uncertainty has been calculated and applied in accordance with these standards. Uncertainties have been calculated according to the DEKRA internal document. The reported expanded uncertainties are based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95%. ENVIRONMENTAL CONDITIONS The climatic conditions during the tests are within the limits specified by the manufacturer for the operation of the EUT and the test equipment. The climatic conditions during the tests were within the following limits: Ambient temperature 15 °C – 35 °C Relative Humidity air …

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ASA ELECTRONICS. ACTH25REM: Antenna Specification VersionDateDescriptionReport 112-25-2025 Description of BLE Antenna ConfigurationRongXin.Hong Slide 1 ACTH25REM : Internal View of Antenna •PCB has 2 copper layers with total thickness of 1.2mm Antenna Trace (BOTTOM Layer) Antenna Feed Point Antenna Matching Components Ground-plane Layer (BOTTOM Layer) Slide 2 Summary of Antenna Properties Slide 3 •Antenna Type: •Manufacturer’s Name: •Manufacturer's Address: •Peak Antenna Gain: •Frequency Range: •Antenna Dimensions: ref. previous slide [2]: Meandered Inverted-F Antenna (IFA) trace on PCB, with matching components tuned for optimum efficiency 1.5dBi 2.402GHz – 2.480GHz [BLE band] PCB trace area 5.8mm X 14.4mm SHENZHEN FENGHUAXIN PRECISION CIRCUIT CO.,LTD HuitongIndustrial Park, XinxuTown, HuiyangDistrict, Huizhou City, Guangdong Province

DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 https://www.dekra.com Report no.: 4949054.50 Page 1 / 68 Test report No: 4949054.50 TEST REPORT Radio Spectrum Matters (RF) Identification of item tested Thermostat remote (BT) Trademark Advent Air Model and /or type reference ACTH25REM FCC ID 2AHU2-ACTH25REM Features Battery”AAA”: 1.5 V*2=3 V Applicant ́s name / address ASA Electronics Shenzhen Limited Room 503, 5/F., Unit A, Skyworth Building, Gaoxin Avenue.1.s., Nanshan District, Shenzhen, Guangdong, China. Test method requested, standard FCC CFR Title 47 Part15 Subpart C Section 15.247; KDB558074 D01v05r02; Verdict Summary COMPLIANCE Tested by (name & signature) Jazz Liang Approved by (name & signature) Tim Yan Date of issue 2026-01-15 Report template No TRF_EMC 2017-06- FCC_Part15C_247 DEKRA Testing and Certification (Shanghai) Ltd. Guangzhou Branch Block 5, No.3, Qiyun Road, Huangpu District, Guangzhou, Guangdong, China Tel +86 20 6661 2000 Fax +86 20 6661 2001 https://www.dekra.com Report no.: 4949054.50 Page 2 / 68 INDEX page General conditions ...................................................................................................................................................... 3 Uncertainty .................................................................................................................................................................. 3 Environmental conditions............................................................................................................................................ 3 Possible test case verdicts ......................................................................................................................................... 3 Definition of symbols used in this test report .............................................................................................................. 4 Abbreviations .............................................................................................................................................................. 4 Document History ....................................................................................................................................................... 4 Remarks and Comments ............................................................................................................................................ 4 1 General Information ........................................................................................................................................... 5 1.1 General Description of the Item(s) .......................................................................................................... 5 1.2 Test data ................................................................................................................................................. 8 1.3 The environment(s) in which the EUT is intended to be used ................................................................ 8 2 Description of Test Setup .................................................................................................................................. 9 2.1 Operating mode(s) used for tests............................................................................................................ 9 2.2 Support / Auxiliary equipment / unit / software for the EUT .................................................................... 9 2.3 Test Configuration / Block diagram used for tests .................................................................................. 9 2.4 Measurement procedure ......................................................................................................................... 9 3 Verdict summary section ................................................................................................................................. 10 3.1 Standards .............................................................................................................................................. 10 3.2 Deviation(s) from the Standard(s) / Test Specification(s) ..................................................................... 10 3.3 Overview of results ................................................................................................................................ 10 4 Transmitter Test Results ................................................................................................................................. 11 4.1 AC Power Line Conducted Emission .................................................................................................... 11 4.2 Emissions in non-restricted frequency bands ....................................................................................... 12 4.3 Emissions in restricted frequency bands .............................................................................................. 29 4.4 Band Edge ............................................................................................................................................. 40 4.5 Duty cycle .............................................................................................................................................. 45 4.6 DTS Bandwidth ..................................................................................................................................... 47 4.7 Fundamental emission output power .................................................................................................... 56 4.8 Power Density ....................................................................................................................................... 61 5 Identification of the Equipment Under Test ..................................................................................................... 64 Annex 1 – Measu…

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