2BK5P-TEJ3575BCTNTRAILER JACK

NINGBO TIANSHENG SHAFT CO, LTD Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 23, 2024 FCC ID: 2BK5P-TEJ3575BCTN Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing NINGBO TIANSHENG SHAFT 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing NINGBO TIANSHENG SHAFT CO, LTD 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. Applicant: NINGBO TIANSHENG SHAFT CO, LTD Address: 399TH TIANHU ROAD, LUOTUO TOWN, ZHENHAI DISTRICT, NINGBO, CHINA Contact Person: Xiaoyong Wu Tel.: +86-13738482108 Email: [email protected] Sincerely, Signature:

NINGBO TIANSHENG SHAFT CO, LTD U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: 09-23-2024 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BK5P-TEJ3575BCTN NINGBO TIANSHENG SHAFT CO, LTD (“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation 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. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: NINGBO TIANSHENG SHAFT CO, LTD FRN: 0035949932 Address: 399TH TIANHU ROAD, LUOTUO TOWN, ZHENHAI DISTRICT, NINGBO, CHINA Signature: Contact Person: Xiaoyong Wu Tel: +86-13738482108 Email: [email protected]

NINGBO TIANSHENG SHAFT CO, LTD Date：September 23, 2024 Product Model Number: TEJ3575BCTN, TEJ3575BCTN, TEJ5075BCTN, TEJ4075BCTN FCC ID：2BK5P-TEJ3575BCTN 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: Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: +86-13738482108 On behalf of: NINGBO TIANSHENG SHAFT CO, LTD

NINGBO TIANSHENG SHAFT CO, LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 23, 2024 Subject; Request for Confidentiality FCC ID: 2BK5P-TEJ3575BCTN 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: Xiaoyong Wu Title: Manager

NINGBO TIANSHENG SHAFT CO, LTD Model Difference Statement Dear Sir/Madam, Added models TEJ3575BCTN, TEJ5075BCTN, TEJ4075BCTN basis of the original product TEJ3575BCTN. The motor speed of the listed series models and the thickness of the supporting steel pipe and the model name are different from the main model, but the circuit and electronic structure are the same, which is declared by the manufacturer. Sincerely, Name: Xiaoyong Wu Title: Manager Address: 399TH TIANHU ROAD, LUOTUO TOWN, ZHENHAI DISTRICT, NINGBO, CHINA

Summary Inverted F Antenna Specification ITEM ANT SPEC Model Name 433.92MHz ANT Center Frequency Horizontal Vertical 433.82MHz 433.92MH 434.02MH 433.82MH 433.92MHz 434.02MHz -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dB Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna type PCB ANT Manufacture DONGGUANSHI YAAI ELECTRON CO.,LTD No.58 Jinsha Road, Shajiao Industrial Zone, Shajiao Village, Shipai Town, Dongguan City, China Antenna Photo & Length (mm) 2.7cm 3.2cm Horizontal: 433.82MHz 433.92 MHz 434.02MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 433.82 -1.26174 -30.0801 -7.18716 433.92 -0.765802 -36.5604 -7.48023 434.02 -0.585582 -22.0315 -6.59127 Vertical: 433.82 MHz 433.92 MHz 434.02MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 433.82 -5.2537 -22.1424 -12.4294 433.92 -2.4652 -24.5837 -10.4702 434.02 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Report No: SSP24090054-1E FCC ID: 2BK5P-TEJ3575BCTN Annex of Test Report Annex A. EUT External Photos EUT View 1 EUT View 2 Report No: SSP24090054-1E FCC ID: 2BK5P-TEJ3575BCTN Annex of Test Report EUT View 3 EUT View 4 Report No: SSP24090054-1E FCC ID: 2BK5P-TEJ3575BCTN Annex of Test Report EUT View 5 EUT View 6 Report No: SSP24090054-1E FCC ID: 2BK5P-TEJ3575BCTN Annex of Test Report EUT View 7

Report No: SSP24090054-1E FCC ID: 2BK5P-TEJ3575BCTN Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

FCC ID: 2BK5P-TEJ3575BCTN RF Exposure Evaluation According to KDB 447498 D04 RF Exposure Procedures and Equipment Authorization Policies for Mobile and Portable Devices part 2.1.2, a single RF source is exempt RF device (from the requirement to show data demonstrating compliance to RF exposure limits, as previously mentioned) if the available maximum time-averaged power is no more than 1mW, regardless of separation distance. This exemption applies to all operating configurations and exposure conditions, for the frequency range 100 kHz to 100 GHz, regardless of fixed, mobile, or portable device exposure conditions. This is a standalone exemption, and it cannot be applied in conjunction with any other test exemption. The result is rounded to one decimal place for comparison Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Frequency (MHz) Power (dBuV/m) Power (dBm) Power (mW) Limit (mW) 433.92 77.32 -17.88 0.02 1 Notes: 77.32dBuV/m-95.2=-17.88dBm 0.04mW＜1mW, so a SAR test is not required.

CCUT Testing & Certification Report No: SSP24090054-1E FCC Test Report Page 1 of 23 FCC TEST REPORT FCC ID: 2BK5P-TEJ3575BCTN Report No. : SSP24090054-1E Applicant : NINGBO TIANSHENG SHAFT CO, LTD Product Name : TRAILER JACK Model Name : TEJ3575BCTN Test Standard : FCC Part 15.231 Date of Issue : 2024-09-28 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. CCUT Testing & Certification Report No: SSP24090054-1E FCC Test Report Page 2 of 23 Test Report Basic Information Applicant..................................: NINGBO TIANSHENG SHAFT CO, LTD Address of Applicant...............: 399TH TIANHU ROAD, LUOTUO TOWN, ZHENHAI DISTRICT, NINGBO, CHINA Manufacturer..........................: NINGBO TIANSHENG SHAFT CO, LTD Address of Manufacturer........: 399TH TIANHU ROAD, LUOTUO TOWN, ZHENHAI DISTRICT, NINGBO, CHINA Product Name.........................: TRAILER JACK Brand Name.............................: - Main Model..............................: TEJ3575BCTN Series Models..........................: TEJ3575BCTN, TEJ5075BCTN, TEJ4075BCTN Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2013 Date of Test .............................: 2024-09-06 to 2024-09-28 Test Result...............................: PASS Tested By ................................: (Walker Wu) Reviewed By............................: (Lieber Ouyang) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. CCUT Testing & Certification Report No: SSP24090054-1E FCC Test Report Page 3 of 23 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................5 1.3 Compliance Standards ...........................................................................................................................................6 1.4 Test Facilities ........................................................................................................................................................6 1.5 List of Measurement Instruments ..........................................................................................................................7 1.6 Measurement Uncertainty .....................................................................................................................................7 2. Summary of Test Results .............................................................................................................................................8 3. Antenna Requirement .................................................................................................................................................9 3.1 Standard and Limit................................................................................................................................................9 3.2 Test Result ............................................................................................................................................................9 4. Conducted Emissions ................................................................................................................................................ 10 4.1 Standard and Limit.............................................................................................................................................. 10 4.2 Test Procedure.................................................................................................................................................... 10 4.3 Test Data and Results .......................................................................................................................................... 11 5. Radiated Emissions ................................................................................................................................................... 12 5.1 Standard and Limit.............................................................................................................................................. 12 5.2 Test Procedure.................................................................................................................................................... 12 5.3 Test Data and Results .......................................................................................................................................... 14 6. Occupied Bandwidth ................................................................................................................................................. 18 6.1 Standard and Limit.............................................................................................................................................. 18 6.2 Test Procedure.................................................................................................................................................... 18 6.3 Test Data and Results ..................................................................................................................................…

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