2A2EP-XL-OBDIICar Diagnostic tool

Shenzhen Kangsai Technology Co., Ltd 2.911 (d)(7) USA Agent v 1.4 Section 2.911(d) (7) USA Agent for Service of Process Company name: Shenzhen Kangsai Technology Co., Ltd. Address: 6th Floor, Left, Building C14, Fuyuan Industrial City, No. 598, Zhoushi Road, Jiwei Community, Hangcheng Sub-district, Bao 'an District, Shenzhen Product Name: Car Diagnostic tool FCC ID: 2A2EP-XL-OBDII Model(s): XL-OBDII 2.911(d) (7) USA Designated Agent for Service of Process We, [Shenzhen Kangsai Technology Co., Ltd.] (“the applicant”) designate [ CELLT INC.] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: CELLT INC. Address: 1401 21ST ST # 12958 SACRAMENTO, CA 95811, USA FRN: 0036412567 Contact Name: Thompson Lim Telephone No: 001-424-3474188 Email: [email protected] Applicant Company name: Shenzhen Kangsai Technology Co., Ltd. Address: 6th Floor, Left, Building C14, Fuyuan Industrial City, No. 598, Zhoushi Road, Jiwei Community, Hangcheng Sub-district, Bao 'an District, Shenzhen FRN: 0031067895 FCC Grantee Code: 2A2EP Shenzhen Kangsai Technology Co., Ltd 2.911 (d)(7) USA Agent v 1.4 Contact Name: Jun Zhu Telephone 13923436850 Email: [email protected] Signature: Title: General Manager Signature: Title: Manager Date: 2026.09.14 Date:2026.09.14 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Rev 1/26/2023 Shenzhen Kangsai Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-14-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2A2EP-XL-OBDII (“Shenzhen Kangsai Technology Co., Ltd.”) 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. (“Shenzhen Kangsai Technology Co., Ltd.”) 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, (Applicant signature) (Applicant printed name) Jun Zhu Rev 1/26/2023 Shenzhen Kangsai Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-14-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2A2EP-XL-OBDII (“Shenzhen Kangsai Technology Co., Ltd.”) certifies that, as of the date of the filing of the application, Shenzhen Kangsai Technology Co., Ltd. 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, (Applicant signature) (Applicant printed name) Jun Zhu

Shenzhen Kangsai Technology Co., Ltd. Date：09-14-2026 Product/ Model Number: XL-OBDII FCC ID：2A2EP-XL-OBDII To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Jun Zhu Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: 13923436850 On behalf of: Shenzhen Kangsai Technology Co., Ltd.

Shenzhen Kangsai Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 15, 2026 Subject; Request for Confidentiality FCC ID: 2A2EP-XL-OBDII To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jun Zhu Title: Manager

FCC ID: 2A2EP-XL-OBDII RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093， Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 5 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f (GHz) ] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f (GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, We use 5mm as separation distance to calculated. Transmit Frequency (GHz) Mode Measured Power (dBm) Tune-up power (dBm) Max tune-up power(dBm) Result calculation 1g SAR 2.440 GFSK -1.57(-1)±1 0 0.3124 3 Remark：1. PCB antenna gain is 0 dBi, So a SAR test is not required

Antenna Specification Summary ITEMANT SPEC Model Name 2 .4G ANT Center Frequency HorizontalVertical 24 00MH z 24 00MHz 2500MHz 2400MHz 2400MHz 2500MHz -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dBi Pola ri zationHorizontal and Vertical Azim uth Be am Pattern Omni-directional Impedance50 O hm ANT Type PCB ANT Manufacture SHANZHEN KANGSAI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) 9.2mm 2.5mm 1.8mm ADD 6th Floor, Left, Building C14, Fuyuan Industrial City, No. 598, Zhoushi Road, Jiwei Community, Hangcheng Sub-district, Bao 'an District, Shenzhen Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 2400 -5.2537-22.1424-12.4294 2450 -2.4652-24.5837-10.4702 2500 -1.86120-29.5214-9.20432

Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26032675E1-1 SZNTT-TR828-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 1 of 27 TEST REPORT Applicant : Shenzhen Kangsai Technology Co., Ltd Address : 6th Floor, Left, Building C14, Fuyuan Industrial City, No. 598, Zhoushi Road, Jiwei Community, Hangcheng Sub-district, Bao 'an District, Shenzhen Manufacturer : Shenzhen Kangsai Technology Co., Ltd Address : 6th Floor, Left, Building C14, Fuyuan Industrial City, No. 598, Zhoushi Road, Jiwei Community, Hangcheng Sub-district, Bao 'an District, Shenzhen Product Name : Car Diagnostic tool Model Number : XL-OBDII Trademark : N/A FCC ID : 2A2EP-XL-OBDII Test Date : Aug. 07, 2026 – Sept. 04, 2026 Date of Report : Sept. 04, 2026 Test Result : This device described above has been tested by NTT, and the test results show that the equipment under test (EUT) is in compliance with the Standard requirements. And it is applicable only to the tested sample identified in the report. Test Procedure Used: Standards : FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10-2020 + Cor. 1-2023+C63.10a-2024 + Errata to C63.10a-2024 KDB 558074 D01 15.247 Meas Guidance v05r02 Prepared by(Test Engineer): Gary Lu Approved(Supervisor): Cindy Qin Approved(Manager): Abel Yu Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26032675E1-1 SZNTT-TR828-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 2 of 27 TABLE OF CONTENT 1. General Information .................................................................................... 4 1.1. Description of Device (EUT) ..................................................................................................................... 4 1.2. Channel List ................................................................................................................................................ 4 1.3. Summary of test result .............................................................................................................................. 5 1.4. Special Accessories and Auxiliary Equipment ....................................................................................... 5 1.5. Test mode .................................................................................................................................................... 5 1.6. Test configuration ...................................................................................................................................... 5 1.7. Block Diagram ............................................................................................................................................ 6 1.8. Test Conditions ........................................................................................................................................... 6 1.9. Measurement Uncertainty (95% confidence levels, k=2) .................................................................... 6 1.10. Test Facility ............................................................................................................................................... 7 1.11. Test Equipment ......................................................................................................................................... 7 2. Conducted emission at the mains terminals test .................................... 9 2.1. Limit .............................................................................................................................................................. 9 2.2. Test Setup ................................................................................................................................................... 9 2.3. Test Procedure ........................................................................................................................................... 9 2.4. Test Result ................................................................................................................................................ 10 3. Radiated Spurious Emissions ................................................................. 11 3.1. Limit ............................................................................................................................................................. 11 3.2. Test Setup ................................................................................................................................................. 12 3.3. Test Procedure ......................................................................................................................................... 14 3.4. Test Result ................................................................................................................................................ 15 4. Conducted Spurious Emissions .............................................................. 20 4.1. Limit ............................................................................................................................................................ 20 4.2. Test Setup ................................................................................................................................................. 20 4.3. Test Procedure ......................................................................................................................................... 20 4.4. Test Result ................................................................................................................................................ 21 5. Band Edge Measurement ......................................................................... 22 5.1. Limit ............................................................................................................................................................ 22 5.2. Test setup .................................................................................................................................................. 22 5.…

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Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page1of23 RF Test Data Duty Cycle ........................................................................................................................................................................... 2 Maximum Peak Conducted Output Power ......................................................................................................................... 5 -6dB Bandwidth ................................................................................................................................................................... 8 Occupied Channel Bandwidth ........................................................................................................................................... 11 Maximum Power Spectral Density Level.......................................................................................................................... 14 Band Edge ......................................................................................................................................................................... 17 Conducted RF Spurious Emission ................................................................................................................................... 20 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page2of23 Duty Cycle Condition Mode Frequency (MHz) Antenna Duty Cycle (%) Correction Factor (dB) 1/T (kHz) NVNT BLE 1M 2402 Ant1 85.6 0.68 0.47 NVNT BLE 1M 2440 Ant1 85.68 0.67 0.47 NVNT BLE 1M 2480 Ant1 85.68 0.67 0.47 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page3of23 Duty Cycle NVNT BLE 1M 2402MHz Ant1 Duty Cycle NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page4of23 Duty Cycle NVNT BLE 1M 2480MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page5of23 Maximum Peak Conducted Output Power Condition Mode Frequency (MHz) Antenna Conducted Power (dBm) Conducted Power (W) Limit Conducted(dBm) Verdict NVNT BLE 1M 2402 Ant1 -1.63 0.00069 30 Pass NVNT BLE 1M 2440 Ant1 -1.57 0.0007 30 Pass NVNT BLE 1M 2480 Ant1 -1.95 0.00064 30 Pass Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page6of23 Peak Power NVNT BLE 1M 2402MHz Ant1 Peak Power NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page7of23 Peak Power NVNT BLE 1M 2480MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page8of23 -6dB Bandwidth Condition Mode Frequency (MHz) Antenna -6 dB Bandwidth (MHz) Limit -6 dB Bandwidth (MHz) Verdict NVNT BLE 1M 2402 Ant1 0.6828 0.5 Pass NVNT BLE 1M 2440 Ant1 0.6927 0.5 Pass NVNT BLE 1M 2480 Ant1 0.6765 0.5 Pass Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page9of23 -6dB Bandwidth NVNT BLE 1M 2402MHz Ant1 -6dB Bandwidth NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page10of23 -6dB Bandwidth NVNT BLE 1M 2480MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page11of23 Occupied Channel Bandwidth Condition Mode Frequency (MHz) Antenna 99% OBW (MHz) NVNT BLE 1M 2402 Ant1 1.0669 NVNT BLE 1M 2440 Ant1 1.069 NVNT BLE 1M 2480 Ant1 1.0509 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page12of23 OBW NVNT BLE 1M 2402MHz Ant1 OBW NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page13of23 OBW NVNT BLE 1M 2480MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page14of23 Maximum Power Spectral Density Level Condition Mode Frequency (MHz) Antenna Conducted PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT BLE 1M 2402 Ant1 -17.37 8 Pass NVNT BLE 1M 2440 Ant1 -17.22 8 Pass NVNT BLE 1M 2480 Ant1 -17.5 8 Pass Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page15of23 PSD NVNT BLE 1M 2402MHz Ant1 PSD NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page16of23 PSD NVNT BLE 1M 2480MHz Ant1 Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page17of23 Band Edge Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT BLE 1M 2402 Ant1 -51.32 -20 Pass NVNT BLE 1M 2480 Ant1 -52.46 -20 Pass Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page18of23 Band Edge NVNT BLE 1M 2402MHz Ant1 Ref Band Edge NVNT BLE 1M 2402MHz Ant1 Emission Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page19of23 Band Edge NVNT BLE 1M 2480MHz Ant1 Ref Band Edge NVNT BLE 1M 2480MHz Ant1 Emission Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page20of23 Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT BLE 1M 2402 Ant1 -43.89 -20 Pass NVNT BLE 1M 2440 Ant1 -43.55 -20 Pass NVNT BLE 1M 2480 Ant1 -41.43 -20 Pass Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page21of23 Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Emission Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page22of23 Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Emission Report No.: SZNTT26032675E1-1 SZNTT-TR728-0 Page23of23 Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Emission