2BNGJECB1PSI Electronic Control Box

July 9, 2025 Nemko North America, Inc. 303 River Road Ottawa ON K1V 1H2 Canada ATTN.: Reviewing Engineer Subject: Covered Equipment Certification Attestation Letter Applicant: Pressure Systems International FCC ID: 2BNGJECB1 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: Ken Kelley Printed name: Ken Kelley Title: V.P. Engineering Company Name: Pressure Systems International Date: 7/8/25 P RESSURE S YSTEMS I NTERNATIONAL 4323 Interstate Way San Antonio, TX 78219 210.222.1926 Phone 210.568-4221 Fax psitireinflation.com Leading the World in Automatic Tire Inflation Systems (A.T.I.S.)

U.S. Agent Designation for Service of Process - Certification Attestation Letter July 9, 2025 Nemko North America, Inc. 303 River Road Ottawa ON K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2BNGJECB1 Applicant FRN: 0036314656 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: • Company Name: Pressure Systems International • Physical U.S. Company Address: 4323 Interstate Way, San Antonio, TX 78219 USA • Agent Name: Joey Roberts • Agent Email Address: [email protected] • Agent FRN**: 0036314656 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: (Required, if different to Applicant) Signed: Ken Kelley Signed: Joey K. Roberts Printed name: Ken Kelley Printed name: Joey Roberts Title: V.P. Engineering Title: Integrations Engineer Company Name: Pressure Systems International Company Name: Pressure Systems International Date: 7/8/25 Date: 7/8/25 P RESSURE S YSTEMS I NTERNATIONAL 4323 Interstate Way San Antonio, TX 78219 210.222.1926 Phone 210.568-4221 Fax psitireinflation.com Leading the World in Automatic Tire Inflation Systems (A.T.I.S.)

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: July 9, 2025 Agency agreement expiration date: July 7, 2026 *Up to 12 months Signed by: Ken Kelley Ken Kelley Signature Print name Vice President of Engineering Title 210-222-1926 Phone On behalf of: Pressure Systems International Company name P RESSURE S YSTEMS I NTERNATIONAL 4323 Interstate Way San Antonio, TX 78219 210.222.1926 Phone 210.568-4221 Fax psitireinflation.com Leading the World in Automatic Tire Inflation Systems (A.T.I.S.)

July 9, 2025 Nemko North America, Inc. 303 River Road, Ottawa, Ontario, Canada K1V 1H2 Attn: Director of Certification Request for Confidentiality – FCC FCC ID: 2BNGJECB1 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 We also request the exhibits selected below as short term confidential (STC) be withheld from public view for a period of 180 days 1 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 2 Exhibit name ☒ Short Term User’s Manual ☒ Short Term Internal Photos ☒ Short Term External Photos ☒ Short Term Test Setup Photos 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 - Number of days can be listed up to 180 but should not go past the date of beginning of product marketing/sale. 2 - Any exhibits that may have already been requested to have “Permanent” confidentiality need not be repeated under Short-Term confidentiality request. P RESSURE S YSTEMS I NTERNATIONAL 4323 Interstate Way San Antonio, TX 78219 210.222.1926 Phone 210.568-4221 Fax psitireinflation.com Leading the World in Automatic Tire Inflation Systems (A.T.I.S.) 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: Ken Kelley Ken Kelley Signature Print name V.P. Engineering Title 210-222-1926 Phone Pressure Systems International Company 4323 Interstate Way, San Antonio, TX 78219 USA Address

Pressure Systems International FCC ID: 2BNGJECB1 IC: 34232-PSIECB1 Model Number: PSI ECB1 Label sample layout Label sample location

www.nemko.com Nemko USA 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-3165.01 FCC and RSS-102 Annex C – MPE Calculation; Date: August 2023 C h o o s e S c a n d i n a v i a n t r u s t RADIO TEST REPORT – APFWL Type of assessment: MPE Calculation report Manufacturer: Pressure Systems International Product Marketing Name (PMN): Hardware Version Identification Number (HVIN): ECB1 PSI ECB1 FCC ID: ISED certification number: 2BNGJECB1 IC: 34232-PSIECB1 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 15, 2023 RSS-102 - Declaration of RF Exposure Compliance ATTESTATION: I attest that, Annex A and the Technical Brief information was prepared by me and is correct; that the device evaluation was performed or supervised by me; that applicable measurement and evaluation methodologies have been followed; and that the device meets the SAR, APD and/or IPD limits of RSS-102. Date of issue: May 5, 2026 Larry Finn Prepared by Signature Section 1 MPE calculation Report reference ID: PRJ0066904 Page 2 of 5 Lab locations Company name Nemko USA Inc. Facilities Round Rock Site: 1601 N AW Grimes Blvd. Round Rock, TX 78665 USA Tel: +1 512 244 3371 Fax: +1 512 244 1846 Test site identifier Organization Round Rock FCC: US3166 ISED: 3036B-1 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 USA’s ISO/IEC 17025 accreditation. Copyright notification Nemko USA 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 USA Inc. Section 1 MPE calculation Report reference ID: PRJ0066904 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)—Power Density Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Power density (mW/cm 2 ) Averaging time (minutes) (i) Limits for Occupational/Controlled Exposure 0.3–3.0 *(100) ≤6 3.0–30 *(900 / f 2 ) <6 30–300 1.0 <6 300–1500 f / 300 <6 1500–100000 5 <6 (ii) Limits for General Population/Uncontrolled Exposure 0.3–1.34 *(100) <30 1.34–30 *(180 / f 2 ) <30 30–300 0.2 <30 300–1500 f / 1500 <30 1500–100000 1.0 <30 Notes: f = frequency in MHz. * = Plane-wave equivalent power density. Section 1 MPE calculation Report reference ID: PRJ0066904 Page 4 of 5 References, definitions and limits, continued RSS-102, Section 5.3.2 The electric and magnetic field strength reference levels, power density reference levels, and associated reference period for devices employed by the general public (uncontrolled environment) and controlled-use devices (controlled environment) are specified in table below. Note that the power density limits specified in these tables apply to whole body exposure conditions. Table 1.1-2: RSS-102— Power density limits Frequency range (MHz) Power density (W/m 2 ) Power density (mW/cm 2 ) Reference Period (minutes) Limits for controlled-use devices (controlled environment) 10–20 10 1 6 20–48 44.72 / ƒ 0.5 4.472 / ƒ 0.5 6 48–100 6.455 0.6455 6 100–6000 0.6455 ƒ 0.5 0.06455 ƒ 0.5 6 6000–15000 50 5 616000 / ƒ 1.2 15000–30000 3.33×10 -4 ƒ 0.333×10 -4 ƒ 616000 / ƒ 1.2 Limits for devices used by the general public (uncontrolled environment) 10–20 2 0.2 6 20–48 8.944 / ƒ 0.5 0.8944 / ƒ 0.5 6 48–300 1.291 0.1291 6 300–6000 0.02619 ƒ 0.6834 0.002619 ƒ 0.6834 6 6000–15000 10 1 616000 / ƒ 1.2 15000–30000 6.67×10 -5 / ƒ 0.667×10 -5 / ƒ 616000 / ƒ 1.2 Notes: ƒ = frequency in MHz. The above table refers to Health Canada’s Safety Code 6 for relevant notes and additional information. Equation from page 18 of OET Bulletin 65, Edition 97-01 푆= 푃퐺 4휋푅 2 where: S = power density (mW/cm 2 or W/m 2 ) P = power input to the antenna (mW or W) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna (cm or m) Section 1 MPE calculation Report reference ID: PRJ0066904 Page 5 of 5 1.1.2 EUT technical information Prediction frequency 2402 MHz Antenna gain -2.19 dBi Number of antennas 1 Maximum transmitter power 18.48 dBm (conducted per port) Prediction distance (declared) 20 cm 1.1.3 MPE calculation Fundamental trans mi t (predi cti on) frequency: 2402 MHz Maxi mum meas ured conducted peak output power: 18.48 dBm Cabl e and/or jumper l os s : 0 dB Maxi mum peak power at antenna i nput termi nal : 18…

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Project #: PRJ0066904 Company: Pressure Systems International EUT Model number: PSI ECB1 EUT Model: ECB1 FCC and ISED Canada Wireless Test Report Prepared for: Pressure Systems International 4323 Interstate Way San Antonio, TX 78219 By Nemko USA, Inc. 1601 North A.W. Grimes Blvd., Suite B Round Rock, Texas 78665 January 12, 2026 Written by Larry Finn Lab Manager PRJ0066904, PSI ECB1 Nemko USA, Inc. Page 2 of 28 Revision History Revision Number Description Date Draft01 Initial release for review 12/2/2024 Final01 Corrected conducted data 6/3/2025 Final02 Added ISED information 7/9/2025 Final03 Updated standard references 1/12/2026 Final04 Updated antenna gain 3/2/2026 PRJ0066904, PSI ECB1 Nemko USA, Inc. Page 3 of 28 Table of Contents Test Result Summary................................................................................................................................................. 5 1.0 Introduction .................................................................................................................................................... 6 1.1 Scope ........................................................................................................................................................ 6 1.2 EUT Description ....................................................................................................................................... 6 1.3 EUT Test Configuration .......................................................................................................................... 6 1.4 Test Setup ................................................................................................................................................ 6 1.5 Test Site .................................................................................................................................................... 6 1.6 Measurement Corrections ...................................................................................................................... 7 1.7 Applicable Documents ............................................................................................................................ 8 2.0 Band Edge ..................................................................................................................................................... 9 2.1 Test Procedure ........................................................................................................................................ 9 2.2 Test Criteria .............................................................................................................................................. 9 2.3 Test Results .............................................................................................................................................. 9 3.0 Occupied Bandwidth .................................................................................................................................. 12 3.1 Test Procedure ...................................................................................................................................... 12 3.2 Test Criteria ............................................................................................................................................ 12 3.3 Test Results – 6dB DTS Bandwidth ................................................................................................... 13 4.0 Output Power .............................................................................................................................................. 15 4.1 Test Procedure ...................................................................................................................................... 15 4.2 Test Criteria ............................................................................................................................................ 15 4.3 Test Results ............................................................................................................................................ 15 5.0 Conducted Spurious Emissions ............................................................................................................... 17 5.1 Test Procedure ...................................................................................................................................... 17 5.2 Test Criteria ............................................................................................................................................ 17 5.3 Test Results ............................................................................................................................................ 18 6.0 Power Spectral Density ............................................................................................................................. 20 6.1 Test Procedure ...................................................................................................................................... 20 6.2 Test Criteria ............................................................................................................................................ 20 6.3 Test Results, Power Spectral Density ................................................................................................ 20 7.0 Transmitter Radiated Spurious Emissions ............................................................................................. 22 7.1 Test Procedure ...................................................................................................................................... 22 7.2 Test Criteria ............................................................................................................................................ 22 7.3 Test Results ............................................................................................................................................ 22 8.0 Measurement Bandwidths ..................…

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www.nemko.com Nemko USA 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-3165.01 Antenna Data Sheet Choose Scandinavian trust Antenna Data Sheet Type of assessment: Antenna Gain Pattern Measurement Manufacturer: Antenna Model #: TenX CON-3758 Operating Frequency: Antenna Type: 2400 – 2500MHz Monopole Peak Gain: Mounting Type: -2.19 dBi Soldered (PCB Mount) Date of issue: February 27, 2026 Larry Finn Prepared by Signature Section 1 Antenna Data Report reference ID: PRJ0096855 Page 2 of 5 Lab locations Company name Nemko USA Inc. Facilities Round Rock Site: 1601 N AW Grimes Blvd. Round Rock, TX 78665 USA Tel: +1 512 244 3371 Fax: +1 512 244 1846 Test site identifier Organization Round Rock FCC: US3166 ISED: 3036B-1 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 USA’s ISO/IEC 17025 accreditation. Copyright notification Nemko USA 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 USA Inc. Section 1 Antenna Data Report reference ID: PRJ0096855 Page 3 of 5 Antenna Data 1.1 Antenna Tabular Data Azimuth Gain Measurement Results: Frequency (MHz) 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 Peak Gain (dBi) -5.88 -4.67 -3.65 -5.97 -5.23 -4.62 -5.11 -3.80 -5.49 -6.39 -3.70 Average Gain (dB) -7.37 -7.19 -6.46 -8.85 -8.13 -6.42 -8.14 -7.86 -8.56 -8.93 -7.17 Elevation Cut #1 Gain Measurement Results: Frequency (MHz) 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 Peak Gain (dBi) -3.94 -3.23 -2.19 -3.30 -3.34 -3.97 -5.84 -5.51 -6.22 -4.56 -4.32 Average Gain (dB) -7.00 -6.02 -4.65 -6.42 -6.84 -7.92 -8.92 -8.48 -8.48 -8.19 -7.36 Elevation Cut #2 Gain Measurement Results: Frequency (MHz) 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 Peak Gain (dBi) -7.36 -5.87 -5.28 -7.36 -6.43 -5.37 -7.02 -6.20 -4.93 -4.97 -6.44 Average Gain (dB) -9.88 -9.34 -8.35 -9.95 -10.09 -8.13 -9.53 -9.57 -9.59 -10.17 -10.55 Section 1 Antenna Data Report reference ID: PRJ0096855 Page 4 of 5 1.2 Antenna Pattern Data Azimuth Gain Pattern (H+V) Elevation Cut #1 Gain Pattern (H+V) Total Power (dBm) Angle (°) Scale: 2/div Min: -20 Max: -2 0 180 30 210 60 240 90270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz Total Power (dBm) Angle (°) Scale: 2/div Min: -18 Max: -2 0 180 30 210 60 240 90270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz Section 1 Antenna Data Report reference ID: PRJ0096855 Page 5 of 5 Elevation Cut #2 Gain Pattern (H+V) End of the test report Total Power (dBm) Angle (°) Scale: 2/div Min: -20 Max: -4 0 180 30 210 60 240 90270 120 300 150 330 2400 MHz 2410 MHz 2420 MHz 2430 MHz 2440 MHz 2450 MHz 2460 MHz 2470 MHz 2480 MHz 2490 MHz 2500 MHz