2ABBZ-RF-CO-319Wireless CO Detector

TÜV SÜD America Inc 141 14 th Street NW New Brighton, MN 55112 Phone: 651-631-2487 www.tuv-sud-america.com TÜV SÜD SIGNATURE NAME JOB TITLE RESPONSIBLE FOR ISSUE DATE Yves-Thierry Jean-Charles Senior Engineer Authorized Signatory 22 November 2025 Signatures in this approval box have checked this document in line with the requirements of TÜV SÜD America, Inc. document control rules. FCC Accreditation Designation Number US1148 New Brighton, MN Test Laboratory Innovation, Science, and Economic Development Canada Accreditation Site Number 4512A New Brighton, MN Test Laboratory Certification Exhibit RF Exposure: FCC 47 CFR Part 2.1093 Cinch Systems Inc RF-UT-EI-CO-319 Module FCC ID: 2ABBZ-RF-CO-319 Module IC: 11817A-RFCO319 Prepared for: Cinch Systems Inc 12075 43rd St NE Ste 300 Saint Michael, MN 55376 COMMERCIAL-IN-CONFIDENCE Document Number: NC721003871.13 | Issue: 2 Document Number: NC721003871.13 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 2 of 5 Contents 1 Report Summary .........................................................................................................................3 1.1 Document Modification Record .....................................................................................................3 1.2 Purpose .........................................................................................................................................3 1.3 General Information.......................................................................................................................3 1.4 Device under Test (DUT) Description ...........................................................................................3 1.5 Technical Information ....................................................................................................................3 2 Evaluation Details .......................................................................................................................4 2.1 Specific Requirements ..................................................................................................................4 2.2 RF Exposure Assessment .............................................................................................................5 3 Conclusion ...................................................................................................................................5 Document Number: NC721003871.13 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 3 of 5 1 Report Summary 1.1 Document Modification Record Alterations and Additions of this document will be issued to the holders of each copy in the form of a complete document. Issue Description of Change Date of Issue 1 First Issue 2025-October-20 2 Updated the Model Number and the antenna gain 2025-November-22 1.2 Purpose The purpose of the document is to report the RF exposure evaluation of the RF-UT-EI-CO-319 in accordance with FCC 47 CFR Part 2.1093. 1.3 General Information Applicant: Cinch Systems Inc Device Category: Portable Environment: General Population/Uncontrolled Exposure Test Specification/Issue/Date: US Code of Federal Regulations (CFR): Title 47, Part 1, Subpart I: Procedures Implementing the National Environmental Policy Act of 1969, 2024. US Code of Federal Regulations (CFR): Title 47, Part 2, Subpart J: Equipment Authorization Procedures, 2024. 1.4 Device under Test (DUT) Description The device under test was a Carbon Monoxide Detector. The device includes a 319 MHz transceiver. 1.5 Technical Information FCC ID: 2ABBZ-RF-CO-319 ISED Certification Number: 11817A-RFCO319 Transmission Protocol: 319 MHz Proprietary Transceiver Frequency: 319.508 MHz Antenna Type: Wire Antenna Antenna Gain: -18.51 dBi Maximum Field Strength: 70.87 dBuV/m Measurement Distance: 3 m Exposure Conditions: ≤ 5 mm Document Number: NC721003871.13 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 4 of 5 2 Evaluation Details 2.1 Specific Requirements FCC 47 CFR Part 1.1307 Actions that may have a significant environmental effect, for which Environmental Assessments (EAs) must be prepared. 1.1307 (b)(3)Determination of exemption. (i) For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of this section. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: 푃 푡ℎ = { 퐸푅푃 20 푐푚 ( 푑 20 푐푚) 푥 푑 ≤20 푐푚 퐸푅푃 20 푐푚 20 푐푚<푑 ≤40 푐푚 Where 푥= −푙표푔 10 ( 60 퐸푅푃 20 푐푚 √ 푓 ) 푎푛푑 푓 푖푠 푖푛 퐺퐻푧; And 퐸푅푃 20 푐푚 ( 푚푤 ) = { 2040푓 0.3 퐺퐻푧 ≤푓 <1.5 퐺퐻푧 3060 1.5 퐺퐻푧 ≤푓 <6 퐺퐻푧 푑=푡ℎ푒 푠푒푝푎푟푎푡푖표푛 푑푖푠푡푎푛푐푒 (푐푚) (C) Or using Table 1 and 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. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) Document Number: NC721003871.13 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 5 of 5 do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). Table 1 to § 1.1307(b)(3)(i)(C)—Single RF Sources…

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TÜV SÜD America Inc 141 14 th Street NW New Brighton, MN 55112 Phone: 651-631-2487 www.tuv-sud-america.com TÜV SÜD 1 RESPONSIBLE FOR NAME DATE SIGNATURE Authorized Signatory Ferdinand S. Custodio 2025 -November-22 Testing Yves-Thierry Jean-Charles 2025-November-22 Signatures in this approval box have checked this document in line with the requirements of TÜV SÜD Product Service document control rules. FCC Accreditation Designation Number US1148 New Brighton, MN Test Laboratory Innovation, Science, and Economic Development Canada Accreditation Site Number 4512A New Brighton, MN Test Laboratory EXECUTIVE SUMMARY Samples of this product were tested and found to be compliant with the standards listed above and the tests shown in Table 1.3-1 of this report. A2LA Cert. No. 2955.11 DISCLAIMER AND COPYRIGHT This non-binding report has been prepared by TÜV SÜD America with all reasonable skill and care. The document is confidential to the potential Client and TÜV SÜD America. No part of this document may be reproduced without the prior written approval of TÜV SÜD America. © TÜV SÜD. DISCLAIMER AND COPYRIGHT Our A2LA Accreditation does not cover opinions and interpretations and any expressed are outside the scope of our A2LA Accreditation. Results of test not covered by our A2LA Accreditation Schedule are marked NUA (Not A2LA Accredited). FCC and ISED Canada Testing of the Cinch Systems Inc RF-UT-EI-CO-319 In accordance with FCC 47 CFR part 15.231 and ISED Canada’s Radio Standards Specifications RSS-210 Prepared for: Cinch Systems Inc 12075 43rd St NE Ste 300 Saint Michael, MN 55376 FCC ID: 2ABBZ-RF-CO-319 IC: 11817A-RFCO319 COMMERCIAL-IN-CONFIDENCE Document Number: NC721003871.9 | Issue: 2 Document Number: NC721003871.9 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 2 of 55 Contents 1 Report Summary .........................................................................................................................3 1.1 Report Modification Record ...........................................................................................................3 1.2 Introduction ....................................................................................................................................3 1.3 Summary of Results ......................................................................................................................5 1.4 Product Information .......................................................................................................................6 1.5 Deviations from the Standard ........................................................................................................7 1.6 EUT Modification Record ..............................................................................................................7 1.7 Test Location .................................................................................................................................8 2 Test Details ..................................................................................................................................9 2.1 Antenna Requirements..................................................................................................................9 2.2 Periodic Operation ...................................................................................................................... 11 2.3 Radiated Field Strength and Spurious Emissions ...................................................................... 18 2.4 20 dB Bandwidth ........................................................................................................................ 44 2.5 99% Bandwidth .......................................................................................................................... 47 3 Test Equipment Information ................................................................................................... 49 3.1 General Test Equipment Used ................................................................................................... 49 4 Diagram of Test Set-ups .......................................................................................................... 51 5 Measurement Uncertainty ....................................................................................................... 54 6 Accreditation, Disclaimers and Copyright............................................................................. 55 Document Number: NC721003871.9 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 3 of 55 1 Report Summary 1.1 Report Modification Record Alterations and additions to this report will be issued to the holders of each copy in the form of a complete document. Issue Description of Change Date of Issue 1 First Issue 2025-November-12 2 Updated the Model Number and the antenna gain information 2025-November-22 1.2 Introduction The purpose of this report is to demonstrate compliance with Part 15 Subpart C of the FCC’s Code of Federal Regulations Section 15.231 and Innovation Science and Economic Development Canada’s Radio Standards Specification RSS-210 for the tests documented herein. Document Number: NC721003871.9 | Issue: 2 COMMERCIAL-IN-CONFIDENCE Page 4 of 55 Applicant Cinch Systems Inc Manufacturer Cinch Systems Inc Applicant’s Email Address [email protected] Model Number(s) RF-UT-EI-CO-319 Serial Number(s) X5-3 (Radiated Emissions), X5-12 (Timing) FCC ID 2ABBZ-RF-CO-319 ISED Certification Number 11817A-RFCO319 HVIN RF-CO-319 Hardware Version(s) x5 Software Version(s) v013 Number of Samples Tested 2 Test Specification/Issue/Date US Code of Federal Regulations (CFR): Title 47, Part 15, Subpart C: Radio Frequency Devices, Intentional Radiators, 2024. Innovation, Science and Economic Development Canada Radio Standards Specification RSS-210, Licence-Exempt Radio Apparatus: Category I Equipment, issue 11, June 2024. Order Number 721003871 Date 2024-September-06 Date of Receipt of EUT 2025-September-23 Start of Test 2025-September…

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QS-5230-840 Antenna info Overview: • Antenna description: The antenna is a piece of wire and used in a monopole arrangement. The Antenna is permanently attached to the PCBA. The Antenna does not use a reverse polarity connector. Antenna Drawing Antenna design/Simulation data: Frequency 319.508 MHz Length 85mm Diameter 0.085 inches Capacitance 45.42 pF Inductance 14.85 nH Quarter Wavelength 0.115 m Antenna Gain -18.51dBi Radiation Resistance 0.53 Ohms Antenna Gain -18.51dBi