2BRSO-FX2W2.4GHz HD Processing

SprintLink User Manual www.Sprintlink.cn Contents 1. Package Contents ............................................................................................................................. 1 2. Product Description ........................................................................................................... .............. 2 2.1. Parameters ............................................................................................................................ 2 2.2. Air Unit Interfaces ................................................................................................................ 3 2.3. Ground Unit Interfaces ......................................................................................................... 4 3. System setup .................................................................................................................................... 5 3.1. Air Unit Installation .............................................................................................................. 5 3.1.1. Antenna installation ................................................................................................... 5 3.1.2. Power supply ............................................................................................................. 5 3.1.3. Connect camera ......................................................................................................... 6 3.1.4. Connect flight controller (RC & telemetry) .............................................................. 6 3.2. Ground Unit Installation ....................................................................................................... 7 3.2.1. Antenna installation ................................................................................................... 7 3.2.2. Power supply ............................................................................................................. 7 3.2.3. Telemetry connection ................................................................................................ 8 3.2.4. Connect remote controller ......................................................................................... 8 3.2.5. Setup video output ..................................................................................................... 9 3.3. Use SprintLink System ......................................................................................................... 9 4. Device Management ...................................................................................................................... 11 4.1. Manage Air Unit ................................................................................................................. 11 4.2. Manage Ground Unit .......................................................................................................... 13 5. Applications ................................................................................................................................... 16 5.1. Telemetry connection ......................................................................................................... 16 5.1.1. Telemetry over Mission Planner (MP) .................................................................... 16 5.1.2. Telemetry over QGroundControl (QGC): ............................................................... 17 5.2. Get live video...................................................................................................................... 18 5.2.1. Getting Video through QGC.................................................................................... 18 5.2.2. Getting Video through VLC .................................................................................... 19 6. Notes .............................................................................................................................................. 20 6.1. Link performance ............................................................................................................... 20 6.2. RC link & remote controller ............................................................................................... 20 6.3. Firmware update ................................................................................................................. 20 6.4. Bind operation .................................................................................................................... 21 6.4.1. Bind through physical bind button .......................................................................... 21 6.4.2. Trigger Bind from bind settings through web UI .................................................... 21 6.4.3. Binding through Color ID........................................................................................ 21 (4) If unit is restored to factory setting, bind again is needed. ................................................. 22 6.5. PC Windows firewall.......................................................................................................... 22 6.6. Set PC IP address ................................................................................................................ 22 6.7. J30J-25 connector pin definition ........................................................................................ 24 7. FAQ................................................................................................................................................ 25 1 1. Package Contents Air Unit & Ground Unit Air unit antenna × 2 Ground unit antenna × 2 Note: ground unit antenna can be replaced by directional patch antenna according to customer requirement. Air unit cables No. Interface 1 Ethernet 2,3 S.BUS, as shown in picture, the 1 st pin from the left of dupont connector is S.BUS signal, the 3 rd is G. 4,5 Telemetry serial, as shown in picture, the 2 nd pin from the left of GH1.25 connector is Rx, the 3 rd is Tx, the 6 th is G. (TTL by…

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Wuxi Yuanchuan Rongchuang Technology Co., Ltd Covered Equipment Certification Attestation Letter 9/17/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BRSO-FX2W Wuxi Yuanchuan Rongchuang Technology Co., Ltd (“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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Wuxi Yuanchuan Rongchuang Technology Co., Ltd (“the applicant”) certifies that, as of the date of the filing of the application, the applicant 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. Wuxi Yuanchuan Rongchuang Technology Co., Ltd (“the applicant”) 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). Signed: Printed name: Guangyong Xu Title: Manager Company Name: Wuxi Yuanchuan Rongchuang Technology Co., Ltd Date: 9/17/2025

Wuxi Yuanchuan Rongchuang Technology Co., Ltd U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: September 17, 2025 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BRSO-FX2W Wuxi Yuanchuan Rongchuang Technology 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: Wuxi Yuanchuan Rongchuang Technology Co., Ltd FRN: 0037417037 Address: 801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China Signature: Contact Person: Guangyong Xu Tel: +86-18751868270 Email: [email protected]

DATE: September 17, 2025 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BRSO-FX2W Product Name: 2.4GHz HD Processing Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name: Guangyong Xu Title: Manager Company: Wuxi Yuanchuan Rongchuang Technology Co., Ltd

Date: September 17, 2025 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). Sincerely, <Signature> Name: Guangyong Xu Title: Manager Company: Wuxi Yuanchuan Rongchuang Technology Co., Ltd

DATE: September 17, 2025 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen CCUT Quality Technology Co., Ltd. (1F, Building 35, Changxing Technology Indstrl Park Changzhen Community, Yutang Street,Shenzhen,China) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with Wuxi Yuanchuan Rongchuang Technology Co., Ltd (801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China). <Signature> Name: Guangyong Xu Title: Manager Applicant Company: Wuxi Yuanchuan Rongchuang Technology Co., Ltd

Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report Annex A. EUT External Photos Model: FX2W EUT View 1 EUT View 2 Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report EUT View 3 EUT View 4 Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report EUT View 5 EUT View 6 Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report EUT View 7 EUT View 8 Integral Antenna 2 Integral Antenna 1 Power supply port

Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W 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

Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report Annex B. EUT Internal Photos Model: FX2W EUT View 1 EUT View 2 Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report EUT View 3 EUT View 4 Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report EUT View 5

FCC ID: 2BRSO-FX2W RF Exposure Evaluation Limits The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) 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) (A) Limits for Occupational/Controlled Exposures 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 1500–100,000 5 6 (B) 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 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Test Result of RF Exposure Evaluation OFDM mode Mode Output power to antenna (dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result 2444 24.85 24(±1) 25 316.23 0.158 1.0 PASS Remark: antenna gain= 4dBi

Page 1 of 3 1. General Inf ormation 1.1 Antenna Information Manufacturer: Wuxi Yuanchuan Rongchuang Technology Co., Ltd Address of Manufacturer: 801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China Product Name: External Antenna Model Name: FX2W Frequency Range: 2410MHz ~2478MHz Type of Antenna: External Antenna Antenna Gain: 4dBi (Max.) Impedance: 50 ohm Antenna View: Length * Width (198mm * 13mm) Page 2 of 3 2. Antenna Specification inf ormation 2.1 Gain Frequency Peak Gain (dBi) Polarity 2410MHz 4 Horizontal 2410MHz 3.23 Vertical 2444MHz 3.94 Horizontal 2444MHz 3.89 Vertical 2578MHz 3.44 Horizontal 2578MHz 3.01 Vertical Page 3 of 3 2.2 Radiation Pattern View

Page 1 of 3 1. General Inf ormation 1.1 Antenna Information Manufacturer: Wuxi Yuanchuan Rongchuang Technology Co., Ltd Address of Manufacturer: 801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China Product Name: External Antenna Model Name: FX2W Frequency Range: 2410MHz ~2478MHz Type of Antenna: External Antenna Antenna Gain: 4dBi (Max.) Impedance: 50 ohm Antenna View: Length * Width (198mm * 13mm) Page 2 of 3 2. Antenna Specification inf ormation 2.1 Gain Frequency Peak Gain (dBi) Polarity 2410MHz 4 Horizontal 2410MHz 3.35 Vertical 2444MHz 3.75 Horizontal 2444MHz 3.7 Vertical 2578MHz 2.34 Horizontal 2578MHz 2.14 Vertical Page 3 of 3 2.2 Radiation Pattern View

Report No: SSP25080186-1E FCC Test Report Page 1 of 40 FCC TEST REPORT FCC ID: 2BRSO-FX2W Report No. : SSP25080186-1E Applicant : Wuxi Yuanchuan Rongchuang Technology Co., Ltd Product Name : 2.4GHz HD Processing Model Name : FX2W Test Standard : FCC Part 15.247 Date of Issue : 2025-09-19 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. Report No: SSP25080186-1E FCC Test Report Page 2 of 40 Test Report Basic Information Applicant..................................: Wuxi Yuanchuan Rongchuang Technology Co., Ltd Address of Applicant...............: 801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China Manufacturer..........................: Wuxi Yuanchuan Rongchuang Technology Co., Ltd Address of Manufacturer........: 801, Building A2, No. 32, Qingyan Road, Xinwu District, Wuxi, China Product Name.........................: 2.4GHz HD Processing Brand Name.............................: SprintLink Main Model..............................: FX2W Series Models..........................: - Test Standard..........................: FCC Part 15 Subpart C KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.4-2014 ANSI C63.10-2013 Date of Test .............................: 2025-08-09 to 2025-09-19 Test Result...............................: PASS Tested By ................................: (Walker Wu) Reviewed By............................: (Lorzix Luo) 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. Report No: SSP25080186-1E FCC Test Report Page 3 of 40 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 14 5.1 Standard and Limit.............................................................................................................................................. 14 5.2 Test Procedure.................................................................................................................................................... 14 5.3 Test Data and Results .......................................................................................................................................... 16 6. Band-edge Emissions(Radiated) ............................................................................................................................... 20 6.1 Standard and Limit.............................................................................................................................................. 20 6.2 Test Procedure.................................................................................................................................................... 20 6.3 Test Data and Results .......................................................................................................................................... 20 7. Maximum Conducted …

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Report No: SSP25080186-1E FCC ID: 2BRSO-FX2W Annex of Test Report Annex C. Test Photos Radiated Emission Test View Below 1GHz Radiated Emission Test View Above 1GHz