Q5Q-WRFG200Wireless Sensor System

January 10, 2025 Nemko North America, Inc. 303 River Road Ottawa ON K1V 1H2 Canada ATTN.: Reviewing Engineer Subject: Covered Equipment Certification Attestation Letter Applicant: Echometer Company FCC ID: Q5Q-WRFG200 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. This includes certifying 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). Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current FCC Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. 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. Signed: Printed name: Gustavo Fernandez Title: Vice President Company Name: Echometer Company Date: January 10, 2025

* 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. ** the agent does not have an FRN because they do no other business with the FCC except for acting as a US agent for service of process, and therefore are not required to have their own FRN. U.S. Agent Designation for Service of Process - Certification Attestation Letter January 10, 2025 Nemko North America, Inc. 303 River Road Ottawa ON K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: Q5Q-WRFG200 Applicant FRN: 0021292024 This letter serves as a formal designation, pursuant to §2.911(d)(7) of the FCC Rules, of the following U.S. Agent* for Service of Process for the equipment under application: U.S. Agent for Service of Process: • Echometer Company • Physical U.S. Company Address: 5001 Ditto Lane, Wichita Falls, Texas, 76308 USA • Agent Name: Gustavo Fernandez • Agent Email Address: [email protected] • Agent FRN**: 0021292024 The above listed designated agent hereby acknowledges and accepts the obligation for service of process on behalf of the applicant signed below. The applicant further acknowledges and accepts its obligation to maintain a U.S. Agent for Service of Process for a minimum period of one year following either: • Permanent termination of all marketing and importation activities within the U.S. for the applicable equipment by the grantee. • The conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever occurs later. Applicant Signed: Designated Agent Signed: Signed: Signed: Printed name: Gustavo Fernandez Printed name: Title: Vice President Title: Company Name: Echometer Company Company Name: Date: January 10, 2025 Date:

Nemko North America, Inc. 303 River Road, Ottawa, Ontario, Canada K1V 1H2 Attn: Director of Certification Appointment of Agent for FCC and ISED Certification Application Dear Director of Certification, This letter formally appoints Spencer Zhong of Nemko Canada, Inc. located at 303 River Road, Ottawa, Ontario, Canada K1V 1H2, as our authorized agent to represent us in the application process for equipment certification. We confirm that the submitted documents accurately depict the device or system seeking certification. Additionally, we guarantee that all units produced, imported, or marketed, as defined by FCC and ISED Canada regulations, will possess a label identical to the one submitted with this application. By signing below, we certify that neither our company nor any party involved in the application is subject to denial of federal benefits, including FCC benefits, as outlined in Section 5301 of the Anti- Drug Abuse Act of 1988 (21 U.S.C. §862) due to a conviction for possession or distribution of a controlled substance. Furthermore, no party involved in the application, as defined in 47 CFR 1.2002 (b), is subject to denial of federal benefits, including FCC benefits. We attest to the truth and accuracy of the information provided to the FCC to the best of our knowledge (47 CFR 2.911 (d)) and acknowledge our responsibilities as a grantee regarding certified equipment (47 CFR 2.909). In instances where our authorized agent signs the application for certification on our behalf, we understand that Nemko North America, Inc. remains solely responsible for adhering to the terms and conditions for certification as specified by Nemko Canada Inc. Sincerely, Dated: January 10, 2025 Agency agreement expiration date: January 10, 2026 *Up to 12 months Signed by: Gustavo Fernandez Signature Print name Vice President Title (940) 767-4334 Phone On behalf of: Echometer Company name

January 10, 2025 Nemko North America, Inc. 303 River Road, Ottawa, Ontario, Canada K1V 1H2 Attn: Director of Certification Request for Confidentiality – FCC FCC ID: Q5Q-WRFG200 Pursuant to FCC 47 CFR 0.457(d)(1)(ii) and 0.459 and FCC guidance published in KDB 726920, we hereby request confidential treatment of information accompanying this application as outlined below. We request the exhibits selected below as long term confidential (LTC) be withheld from public view permanently: Selection of exhibits for LTC - general Exhibit name ☒ Permanent (Long Term) Block Diagrams ☒ Permanent (Long Term) Operation Description / Theory of Operation ☒ Permanent (Long Term) Parts List & Placement / BOM ☒ Permanent (Long Term) Schematics Selection of exhibits for LTC - specific 1 Exhibit name ☐ Permanent (Long Term) Tune-Up Procedure ☐ Permanent (Long Term) SDR 2 Software / Security Info We also request the exhibits selected below as short term confidential (STC) be withheld from public view for a period of 180 days 3 from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public: Selection of exhibits for STC 4 Exhibit name x Short Term User’s Manual x Short Term Internal Photos x Short Term External Photos x Short Term Test Setup Photos ☐ Short Term Tune-Up Procedure (for Licensed equipment only) Our company has spent a substantial effort in developing this product and it is one of the first of its kind in the industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. When the device is marketed before the requested number of days listed above, the grantee will inform the TCB to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. 1 - Tune up procedure is applicable only for licensed equipment. 2 - The FCC rules require that any radio, in which the software is designed or expected to be modified by a party other than the manufacturer that would affect the operating parameters of frequency range, modulation type, maximum output power or other radio frequency parameters outside the range under which the transmitter has been approved in accordance with the FCC rules, must be certified as a software-defined radio (SDR). 3 - Number of days can be listed up to 180 but should not go past the date of beginning of product marketing/sale. 4 - Any exhibits that may have already been requested to have “Permanent” confidentiality need not be repeated under Short-Term confidentiality request. The above information contains 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. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Sincerely, Signed by: Gustavo Fernandez Signature Print name Vice President Title (940) 767-4334 Phone Echometer Company 5001 Ditto Lane, Wichita Falls, Texas 76302 Address

January 10, 2025 Nemko North America, Inc. 303 River Road, Ottawa, ON K1V 1H2 Canada Attn: Director of Certification Family Certification request letter We are writing to request Family Certification for the following models associated with our product: • FCC ID: Q5Q-WRFG200 • ISED Certification Number: IC: 10048A-WRFG200 • HVIN/PMNs: WRFG200 WCGG200 WHT200 WPT200 W5KG200 / / Wireless Remote Fire Gun / Wireless Compact Gas Gun / Wireless Horseshoe Loadcell / Wireless Pressure Transducer Wireless 5000PSI Gas Gun While these models share similarities, there are minor modifications that need to be documented. Below, we provide the necessary details: 1. Electrical Differences: ☐ The models are electrically identical. ☒ Although the circuitry and components are largely identical, there are specific variations between the models. These differences include: ▪ The circuit boards, traces and component values are identical in all enclosure variants. However, the size of the front panels does vary between model to model. Wiring may also feature some length differences to accommodate enclosure size differences. 2. Antenna Type and Gain: ☒ All models share the same antenna type and gain. ☐ All models share the same antenna type, but there may be slight variations in gain. Specifically: ▪ [Specify any differences in antenna gain or design between the models.] 3. Enclosure Details: ☐ The enclosures are consistent across models. ☒ The enclosures exhibit minor differences. These include: ▪ The enclosures are all fashioned from metal, but feature mechanical differences to facilitate attachment to a variety of end locations. For example, one has a threaded end for attachment to a pipe fitting. Another has a clamp for attachment to a rod. Test Results Applicability: The test results obtained for one model within this family can be applied to all other models, considering their similarities. However, any significant differences (e.g., frequency bands, power levels, or functionality) must be clearly documented. We appreciate your attention to this matter and look forward to a prompt review of our Family Certification request. If you require any additional information or clarification, please do not hesitate to contact us. Sincerely, Signed by: Gustavo Fernandez Signature Print name Vice President Title 940-767-4334 Phone

Nemko North America, Inc. 303 River Road, Ottawa, Ontario, Canada K1V 1H2 Attn: Director of Certification FCC and ISED signature authorization letter Dear Director of Certification, I, the undersigned, hereby entrust Carrie-Anne Taylor, Vice President of Echometer Company, having email address: [email protected], at Echometer Company, 5001 Ditto Lane, Wichita Falls, Texas, 76308 to act as my representative in the following: • To make the necessary applications and sign documents related to FCC and ISED equipment certifications. Sincerely, Dated: January 10, 2025 Signed by: Gustavo Fernandez Signature Print name Vice President Title 940-767-4334 ext 162 Phone [email protected] email Echometer Company On behalf of: Company name

This document serves to identify the location of certification labels and FCC label/information. Some products have a label dedicated to FCC information where the label states “Reserved for FCC information”. On other products, such as the WHT200 and WPT200 (including all respective options of each product) have a keypad that will display FCC information rather than a label. It can be found on drawings as “Optional Text from PO”. This will serve as the declaration of FCC related information on such products. WRFG200 WR1112 WR1115 2.275 3.400 .136 .450 .500 REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE4/19/2023JBW 5 4 3 2 1 DRAWN BY: MATERIAL UL MATL DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: A SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 10-11-21 SHEET 1 OF 1 WR1112 WRFG200 CERT LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT: ) WRFG200 ECHOMETER CO. 5001 Ditto Lane Wichita Falls, TX USA ECHOMETER Charger Um 5 VDC UL24UKEX2982X ( ( ( ) ) ™ 1500 PSI WP UL 24 ATEX 3218X IECEx UL 24.0033X II 1 G Ex ia IIB T3 Ga IECEx ia IIB T3 Ga -20≤ Ta ≤ 50C E496830 Class I, Div 1, Grps C&D T3C Class I, Zone 0, AEx ia IIB T3 Ga Ex ia IIB T3 Ga X SÉCURITÉ INTRINSÈQUE WARNING! Substitution of Components may impair Intrinsic Safety. AVERTISSEMENT ! La substitution de composants peut nuire à la sécurité intrinsèque WARNING! Reference User Guide Supplement Part Number WR1601 for Safe Setup and Use AVERTISSEMENT ! Référence Supplément au Guide de l'utilisateur Référence WR1601 pour Conguration et utilisation sécurisées WARNING! Charging must be done in a non- hazardous, safe area only. AVERTISSEMENT ! Le chargement doit être eectué uniquement dans un endroit sur et non dangereux. Intrinsically Safe for use in: Performance Optization Equipment for Oil and Gas Wells located in Hazardous Locations LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M 9671LE (300LSE) 83# PCK White background Black text. IECEx 0539 0843 3.390 2.265 R.156TYP RESERVED FOR FCC INFORMATION LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M9671LE (300LSE) 83# PCK White background Black text. REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE5/18/2023JBW 5 4 3 2 1 DRAWN BY: MATERIAL UL LISTED DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: A SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 05/18/23 SHEET 1 OF 1 WR1115 FCC LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH BRUSHED SILVER CLIENT: W5KG200 WR1350 WR1315 3.000 2.995 2.255 2.250 REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED 5 4 3 2 1 DRAWN BY: MATERIAL DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: A SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 05/08/23 SHEET 1 OF 1 WR1315 W5KG200 CERT LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT: ECHOMETER ( ( ( ) ) ) ™ Model W5KG200 ECHOMETER CO. 5001 Ditto Lane Wichita Falls, TX USA Performance Optimization Equipment for Oil and Gas Wells Located in Hazardous Locations 5000 PSI WP E496830 Intrinsically Safe for use in: IECEx UL 24.0033X Ex ia IIB T3 Ga -20≤ Ta ≤ 50C Ex ia IIB T3 Ga X SÉCURITÉ INTRINSÈQUE WARNING! Substitution of Component may impair Intrinsic Safety. WARNING! Reference User Guide Supplement Part Number WR1603 for Safe Setup and Use. WARNING! Charging must be done in a non-hazardous, safe area only. AVERTISSEMENT ! La substitution de composants peut nuire à la sécurité intrinsèque. AVERTISSEMENT ! Référence Supplément au Guide de l'utilisateur Référence WR1603 pour Conguration et utilisation sécurisées. AVERTISSEMENT ! Le chargement doit être eectué uniquement dans un endroit sûr et non dangereux. Um 5VDC LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M 9671LE (300LSE) 83# PCK White background Black text. AINITIAL RELEASE05/17/23JBW IECEx UL 24 ATEX 3218X II 1 G Ex ia IIB T3 Ga 0539 UL24UKEX2982X 0843 Class I, Div, Grps C&D T3C Class I, Zone 0, AEx ia IIB T3 Ga 3.390 2.265 R.156TYP RESERVED FOR FCC INFORMATION LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M9671LE (300LSE) 83# PCK White background Black text. REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE5/18/2023JBW 5 4 3 2 1 DRAWN BY: MATERIAL UL LISTED DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: A SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 05/18/23 SHEET 1 OF 1 WR1350 FCC LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH BRUSHED SILVER CLIENT: WCGG200 WR1522 WR1521 1.875 4.500 R.125 REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE4/12/2023JBW 5 4 3 2 1 DRAWN BY: MATERIAL DATE INITI…

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3.390 2.265 R.156TYP LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M9671LE (300LSE) 83# PCK White background Black text. REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE5/18/2023JBW BADDED FCC INFORMATION2/5/2025TC 5 4 3 2 1 DRAWN BY: MATERIAL UL LISTED DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: B SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 05/18/23 SHEET 1 OF 1 WR1115 FCC LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT: NONE Echometer Company Wichita Falls, TX Tel: +1 (940) 767-4334 www.echometer.com This device complies with part 15 of the FCC rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID: Q5Q-WRFG200 IC: 10048A-WRFG200 Proudly Made In USA

2.362 #8 FH 100 Deg TYP .197 2.000 KEYPAD SPECIFICATION ELECTRICAL DESIGN SPECIFICATIONS ARE FOUND IN DOC#AXE972 R3 ATTACHED. THIS DRAWING IS THE ELECTRICAL AND MECHANICAL DEFINITION OF THE PRODUCT. THIS DRAWING IS CONTROLLED BY ECHOMETER COMPANY. NO CHANGE OR DEVIATION TO AXE972 R3 MAY BE SUPPLIED WITHOUT ECHOMETER APPROVAL IN WRITING. THIS DRAWING DEFINES THE PURCHASING REQUIREMENTS FOR THIS PART. MARKING SYSTEMS, INC. GARLAND, TEXAS. ECHOMETER RECEIVING SHALL VERIFY AT LEAST THE FOLLOWING: THE PRINTED CIRCUIT (VISIBLE ON THE BACK OF THE KEYPAD) IS MARKED AXE972 R3. THE PRODUCT IS FREE FROM ANY COSMETIC DEFECTS. THE PRODUCT IS FULLY FUNCTIONAL CONFORMING TO AXE972 R3 ATTACHED TO PURCHASE ORDER SPECIFICATION. FCC ID: Q5Q-WRFG200 IC: 10048A-WRFG200 REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE09-28-21JBW BADDED FCC INFORMATION2/5/2025TC 5 4 3 2 1 DRAWN BY: MATERIAL DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: B SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 09-26-21 SHEET 1 OF 1 WR1245 KEYPAD, WHT ROUND 2 BUTTON PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT:

3.390 2.265 R.156TYP LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M9671LE (300LSE) 83# PCK White background Black text. REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE5/18/2023JBW BADDED FCC INFORMATION2/5/2025TC 5 4 3 2 1 DRAWN BY: MATERIAL UL LISTED DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: B SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 05/18/23 SHEET 1 OF 1 WR1350 FCC LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT: NONE Echometer Company Wichita Falls, TX Tel: +1 (940) 767-4334 www.echometer.com This device complies with part 15 of the FCC rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID: Q5Q-WRFG200 IC: 10048A-WRFG200 Proudly Made In USA

2.362 #8 FH 100 Deg TYP .197 2.000 KEYPAD SPECIFICATION ELECTRICAL DESIGN SPECIFICATIONS ARE FOUND IN DOC#AXE972 R3 ATTACHED. THIS DRAWING IS THE ELECTRICAL AND MECHANICAL DEFINITION OF THE PRODUCT. THIS DRAWING IS CONTROLLED BY ECHOMETER COMPANY. NO CHANGE OR DEVIATION TO AXE972 R3 MAY BE SUPPLIED WITHOUT ECHOMETER APPROVAL IN WRITING. THIS DRAWING DEFINES THE PURCHASING REQUIREMENTS FOR THIS PART. MARKING SYSTEMS, INC. GARLAND, TEXAS. ECHOMETER RECEIVING SHALL VERIFY AT LEAST THE FOLLOWING: THE PRINTED CIRCUIT (VISIBLE ON THE BACK OF THE KEYPAD) IS MARKED AXE972 R3. THE PRODUCT IS FREE FROM ANY COSMETIC DEFECTS. THE PRODUCT IS FULLY FUNCTIONAL CONFORMING TO AXE972 R3 ATTACHED TO PURCHASE ORDER SPECIFICATION. FCC ID: Q5Q-WRFG200 IC: 10048A-WRFG200 REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE09-28-21JBW BADDED FCC INFORMATION2/5/2025TC 5 4 3 2 1 DRAWN BY: MATERIAL DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: B SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 09-26-21 SHEET 1 OF 1 WR1445 KEYPAD, WPT ROUND 2 BUTTON PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT:

2.272 4.230 R.156 TYPICAL LABEL MATERIAL - LABEL < 14 Mil 10 Mil UV506 Polycarbonate velvet/matte 2 Mil 3M 9671LE (300LSE) 83# PCK White background Black text. REVISIONS ZONEREV.DESCRIPTIONDATEAPPROVED AINITIAL RELEASE5/18/2023JBW BADDED FCC INFORMATION2/5/2025TC 5 4 3 2 1 DRAWN BY: MATERIAL DATE INITIALS ECHOMETER TITLE: SIZE A DWG. NO. REVISION: B SCALE: 1:1 UNLESS OTHERWISE SPECIFIED: DO NOT SCALE DRAWING DIMENSIONS ARE IN INCHES TOLERANCES: FRAC. 1/32 .XX .01 .XXX .005 .XXXX .0005 ANG. .5 JBW 04/12/23 SHEET 1 OF 1 WR1522 PRODUCT LABEL PROPRIETARY AND CONFIDENTIAL: THE INFORMATION CONTAINED IN THIS DRAWING WAS GENERATED ON BEHALF OF JERRY WEST, LLC CLIENT, ECHOMETER. THIS DRAWING IS THE SOLE PROPERTY OF ECHOMETER. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF ECHOMETER IS PROHIBITED. FINISH CLIENT: Tel: +1 (940) 767-4334 www.echometer.com Echometer Company Wichita Falls, TX This device complies with part 15 of the FCC rules. Operation is subject to the following conditions:(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID: Q5Q-WRFG200 IC: 10048A-WRFG200 Proudly Made In USA

www.nemko.com Nemko Canada Inc., a testing laboratory, is accredited by ANSI National Accreditation Board (ANAB). The tests included in this report are within the scope of this accreditation. The ANAB symbol is an official symbol of the ANSI National Accreditation Board, used under licence. ANAB File Number: AT-3195 (Ottawa/Almonte); AT-3193 (Pointe-Claire); AT-3194 (Cambridge) FCC and RSS-102 Annex C – MPE Calculation; Date: August 2023 Choose Scandinavian trust RADIO TEST REPORT Type of assessment: MPE Calculation report Manufacturer: Product description: Echometer Company Wireless Sensor System Model names and numbers (PMNs and HVINs): WRFG200, WCGG200, WHT200, WPT200, W5KG200 FCC ID: ISED certification number: Q5Q-WRFG200 IC: 10048A-WRFG200 Specification:  FCC 47 CFR Part 1 Subpart I, §§1.1307, 1.1310  FCC 47 CFR Part 2 Subpart J, §2.1091  FCC KDB 447498 D01 General RF Exposure Guidance v06  ISED Canada RSS-102 Issue 6 December 2023 RSS-102 Annex B - Declaration of RF Exposure Compliance ATTESTATION: I attest that the radiocommunication apparatus meets the exemption from the routine evaluation limits in Section 6 of this standard; that the Technical Brief was prepared and the information contained therein is correct, that the device evaluation was performed or supervised by the undersigned, that applicable measurement methods and evaluation methodologies have been followed and that the device meets the SAR, NS, APD and/or FRL exposure limits of RSS-102. Date of issue: September 12, 2025 Andrey Adelberg, Senior EMC/RF Specialist Prepared by Signature Section 1 MPE calculation Report reference ID: RF exposure Page 2 of 5 Lab locations Company name Nemko Canada Inc. Facilities Ottawa site: 303 River Road Ottawa, Ontario Canada K1V 1H2 Tel: +1 613 737 9680 Fax: +1 613 737 9691 Montréal site: 292 Labrosse Avenue Pointe-Claire, Québec Canada H9R 5L8 Tel: +1 514 694 2684 Fax: +1 514 694 3528 Cambridge site: 1-130 Saltsman Drive Cambridge, Ontario Canada N3E 0B2 Tel: +1 519 650 4811 Almonte site: 1500 Peter Robinson Road West Carleton, Ontario Canada K0A 1L0 Tel: +1 613 256-9117 Test site identifier Organization Ottawa/Almonte Montreal Cambridge FCC: CA2040 CA2041 CA0101 ISED: 2040A-4 2040G-5 24676 Website www.nemko.com Limits of responsibility Note that the results contained in this report relate only to the items tested and were obtained in the period between the date of initial receipt of samples and the date of issue of the report. This test report has been completed in accordance with the requirements of ISO/IEC 17025. All results contained in this report are within Nemko Canada’s ISO/IEC 17025 accreditation. Copyright notification Nemko Canada Inc. authorizes the applicant to reproduce this report provided it is reproduced in its entirety and for use by the company’s employees only. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Nemko Canada Inc. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. © Nemko Canada Inc. Section 1 MPE calculation Report reference ID: RF exposure Page 3 of 5 Evaluation summary 1.1 MPE calculation for standalone transmission 1.1.1 References, definitions and limits FCC §2.1091(d) (2) (2) For operations within the frequency range of 300 kHz and 6 GHz (inclusive), the limits for maximum permissible exposure (MPE), derived from whole-body SAR limits and listed in Table 1 in paragraph (e)(1) of this section, may be used instead of whole-body SAR limits as set forth in paragraphs (a) through (c) of this section to evaluate the environmental impact of human exposure to RF radiation as specified in §1.1307(b) of this part, except for portable devices as defined in §2.1093 of this chapter as these evaluations shall be performed according to the SAR provisions in §2.1093. Table 1.1-1: Table 1 to §1.1310(e)(1)—Limits for Maximum Permissible Exposure (MPE) 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 <6 300–1500 f / 300 <6 1500–100000 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 <30 300–1500 f / 1500 <30 1500–100000 1.0 <30 Notes: f = frequency in MHz. * = Plane-wave equivalent power density. RSS-102, Section 4 For the purpose of this standard, Industry Canada has adopted the SAR and RF field strength limits established in Health Canada’s RF exposure guideline, Safety Code 6: Table 1.1-2: Table 4 to RSS-102— RF Field Strength Limits Frequency range (MHz) Electric field strength (V/m rms) Magnetic field strength (A/m rms) Power density (W/m 2 ) Reference Period (minutes) Limits for Controlled Environment 10–20 61.4 0.163 10 6 20–48 129.8 / ƒ 0.25 0.3444 / ƒ 0.25 44.72 / ƒ 0.5 6 48–100 49.33 0.1309 6.455 6 100–6000 15.60 ƒ 0.25 0.04138 ƒ 0.25 0.6455 ƒ 0.5 6 6000–15000 137 0.364 50 6 Limits for Uncontrolled Environment 10–20 27.46 0.0728 2 6 20–48 58.07 / ƒ 0.25 0.1540 / ƒ 0.25 8.944 / ƒ 0.5 6 48–300 22.06 0.05852 1.291 6 300–6000 3.142 ƒ 0.3417 0.008335 ƒ 0.3417 0.02619 ƒ 0.6834 6 6000–15000 61.4 0.163 10 6 Notes: ƒ = frequency in MHz. Section 1 MPE calculation Report reference ID: RF exposure Page 4 of 5 References, definitions and limits, continued Equation from page 18 of OET Bulletin 65, Edition 97-01 푆= 푃퐺 4휋푅 2 where: S = power d…

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