2A2UNRTX4C00Digital Proprotional Radio Control System

ShenZhen FLYSKY Technology Co.,Ltd * 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. U.S. Agent Designation for Service of Process - Certification Attestation Letter Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2A2UNRTX4C00 FRN of applicant: 0031248305 Per section 2.911(d)(7) of the FCC rules, ShenZhen FLYSKY Technology Co.,Ltd certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Baihetian Innovative Solutions FCC Registration Number(FRN): 0033401605 Physical U.S. Company Address: 6837 Chase Rd, Dearborn, MI 48126, USA Contact Person: Kenneth Young Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed: Signed: Printed name: Kyle Li Title: RD Manager Company Name: ShenZhen FLYSKY Technology Co.,Ltd Date: 6/27/2023 Agent Signed (if different to Applicant): Signed: Printed name: Kenneth Young Title: Manager Company Name: Baihetian Innovative Solutions Date: 6/27/2023

ShenZhen FLYSKY Technology Co.,Ltd Covered Equipment Certification Attestation Letter 6/27/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2A2UNRTX4C00 ShenZhen FLYSKY 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. 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. ShenZhen FLYSKY Technology 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. Signed: Printed name: Kyle Li Title: RD Manager Company Name: ShenZhen FLYSKY Technology Co.,Ltd Date: 6/27/2023

DATE : 2023-06-27 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Jason Wu of Global United Technology Services Co., Ltd.and No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, 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 ShenZhen FLYSKY Technology Co.,Ltd and 16F, Huafeng Building, No. 6006 Shennan Road, Futian District, Shenzhen, Guangdong, China Signature: Name: Kyle Li Title: RD Manager Company: ShenZhen FLYSKY Technology Co.,Ltd

ShenZhen FLYSKY Technology Co.,Ltd DATE : 2023-06-27 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2A2UNRTX4C00 Product Name: Digital Proprotional Radio Control System Request for Confidentiality 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 Operational Description 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 pursuantto 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. Signature: Name: Kyle Li Title: RD Manager

Test Model No.: RTX‐4C

Test Model No.: RTX‐4C

FCC ID: 2A2UNRTX4C00 RF Exposure evaluation According to 447498 D04 Interim General RF Exposure Guidance v01 FCC ID: 2A2UNRTX4C00 Frequency (MHz) Output power to antenna (dBm) Ant gain(dBi) EIRP(dBm) ERP(dBm) ERP(mw) Distance (cm) P th (mW) 2408 15.950 0.760 16.710 14.56 28.58 2.5 59.1 ERP = EIRP −2.15 dB WORSE CASE 28.58mW<59.1mW Then SAR evaluation is not required Remark: The shortest distance between antenna and The manual part is 2.5cm.

Global United Technology Services Co., Ltd. Report No.: GTS2023060193F01 Authorized Signature: Robinson Luo Laboratory Manager This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 35 TEST REPORT Applicant: ShenZhen FLYSKY Technology Co.,Ltd Address of Applicant: 16F, Huafeng Building, No. 6006 Shennan Road, Futian District, Shenzhen, Guangdong, China Manufacturer: ShenZhen FLYSKY Technology Co.,Ltd Address of Manufacturer: 16F, Huafeng Building, No. 6006 Shennan Road, Futian District, Shenzhen, Guangdong, China Factory: Dongguan Flysky RC Model technology Co.,Ltd Address of Factory: West building 3, HuangjinyuanInd Park, Qiaoli North Gate, Changping Town, Dongguan, China Equipment Under Test (EUT) Product Name: Digital Proprotional Radio Control System Model No.: RTX-4C Trade Mark: FLYSKY FCC ID: 2A2UNRTX4C00 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: June 08, 2023 Date of Test: June 09-27, 2023 Date of report issued: June 27, 2023 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 2 of 35 2 Version Version No. Date Description 00 June 27, 2023 Original Prepared By: Date: June 27, 2023 Project Engineer Check By: Date: June 27, 2023 Reviewer Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 3 of 35 3 Contents Page 1 COVER PAGE ................................................................................................................................................ 1 2 VERSION ........................................................................................................................................................ 2 3 CONTENTS .................................................................................................................................................... 3 4 TEST SUMMARY ........................................................................................................................................... 4 4.1 MEASUREMENT UNCERTAINTY .................................................................................................................. 4 5 GENERAL INFORMATION ............................................................................................................................ 5 5.1 GENERAL DESCRIPTION OF EUT ............................................................................................................... 5 5.2 TEST MODE .............................................................................................................................................. 7 5.3 TEST FACILITY .......................................................................................................................................... 7 5.4 TEST LOCATION ....................................................................................................................................... 7 5.5 DESCRIPTION OF SUPPORT UNITS ............................................................................................................. 7 5.6 DEVIATION FROM STANDARDS ................................................................................................................... 7 5.7 ABNORMALITIES FROM STANDARD CONDITIONS ......................................................................................... 7 5.8 ADDITIONAL INSTRUCTIONS ....................................................................................................................... 7 6 TEST INSTRUMENTS LIST ........................................................................................................................... 8 7 TEST RESULTS AND MEASUREMENT DATA .......................................................................................... 10 7.1 ANTENNA REQUIREMENT ......................................................................................................................... 10 7.2 CONDUCTED PEAK OUTPUT POWER ........................................................................................................ 11 7.3 20DB EMISSION BANDWIDTH .................................................................................................................. 12 7.4 CARRIER FREQUENCIES SEPARATION ...................................................................................................... 13 7.5 HOPPING CHANNEL NUMBER .................................................................................................................. 14 7.6 DWELL TIME ........................................................................................................................................... 15 7.7 SPURIOUS EMISSION IN NON-RESTRICTED & RESTRICTED BANDS ............................................................. 16 7.7.1 Conducted Emission Method ........................................................................................................... 16 7.7.2 Radiated Emission Method .............................................................................................................. 17 8 TEST SETUP PHOTO .................................................................................................................................. 35 9 EUT CONSTRUCTIONAL DETAILS .........…

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Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 1 of 16 1. Bandwidth 1.1 OBW 1.1.1 Test Result Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result GFSK SISO 2408 1 0.563 Pass 2440 1 0.562 Pass 2475 1 0.563 Pass 1.1.2 Test Graph GFSK_LCH_2408MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 2 of 16 GFSK_MCH_2440MHz_Ant1_NTNV GFSK_HCH_2475MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 3 of 16 1.2 20dB BW 1.2.1 Test Result Mode TX Type Frequency (MHz) ANT 20dB Bandwidth (MHz) Verdict Result GFSK SISO 2408 1 0.590 Pass 2440 1 0.591 Pass 2475 1 0.592 Pass . 1.2.2 Test Graph GFSK_LCH_2408MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 4 of 16 GFSK_MCH_2440MHz_Ant1_NTNV GFSK_HCH_2475MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 5 of 16 2. Maximum Conducted Output Power 2.1 Power 2.1.1 Test Result Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit GFSK SISO 2408 15.95 <=20.97 Pass 2440 15.91 <=20.97 Pass 2475 15.86 <=20.97 Pass Note1: Antenna Gain: Ant1: 0.76dBi; 2.1.2 Test Graph GFSK_LCH_2408MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 6 of 16 GFSK_MCH_2440MHz_Ant1_NTNV GFSK_HCH_2475MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 7 of 16 3. Carrier Frequency Separation 3.1 Ant1 3.1.1 Test Result Ant1 Mode TX Type Frequency (MHz) Channel Separation (MHz) 20dB Bandwidth (MHz) Limit (MHz) Verdict GFSK SISO HOPP 2.000 0.592 >=0.592 Pass 3.1.2 Test Graph GFSK_HOPP_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 8 of 16 4. Number of Hopping Frequencies 4.1 HoppNum 4.1.1 Test Result Mode TX Type Frequency (MHz) Num of Hopping Frequencies Verdict ANT1 Limit GFSK SISO HOPP 16 >=15 Pass 4.1.2 Test Graph GFSK_HOPP_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 9 of 16 5. Time of Occupancy (Dwell Time) 5.1 Ant1 5.1.1 Test Result Ant1 Mode TX Type Frequency (MHz) Duration of Single Pulse (ms) Observation Period (s) Num of Pulse in Observation Period Dwell Time (ms) Limit (ms) Verdict GFSK SISO HOPP 0.776 6.400 125 97.000 <=400 Pass 5.1.2 Test Graph GFSK_HOPP_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 10 of 16 GFSK_HOPP_Ant1_NTNV 6. Unwanted Emissions In Non-restricted Frequency Bands 6.1 Ref 6.1.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) GFSK SISO 2408 1 15.92 2440 1 15.87 2475 1 15.82 Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2013, the channel contains the maximum PSD level was used to establish the reference level. Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 11 of 16 6.1.2 Test Graph GFSK_LCH_2408MHz_Ant1_NTNV GFSK_MCH_2440MHz_Ant1_NTNV Report No.: GTS2023060193F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 12 of 16 GFSK_HCH_2475MHz_Ant1_NTNV 6.2 CSE 6.2.1 Test Result Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict GFSK SISO 2408 1 15.92 -4.08 Pass 2440 1 15.92 -4.08 Pass 2475 1 15.92 -4.08 Pass HOPP 1 15.92 -4.08 Pass Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2013, the channel contains the maximum PSD level was used to establish the reference level. Report No.: GTS2023060193F01 Global United Technology Servic…

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1 Shenzhen DEWEIMA Communication Equipment Co.Ltd SPECIFICATION SHEET FOR APPROVAL CUSTOMER NAME (客户名称) ShenZhen FLYSKY Technology Co.,Ltd CUSTOMER P/N (客户料号) FS-G4P-BS-V1.1 PART NAME (品 名) 2.4G On-board antenna DWM P/N (料 号) APPROVAL REV. 版次 CONTRACTOR DATE：2022.6.6 QA CHECKED ME CHECKED RF CHECKED MANAGER CHECKED CUSTOMER DATE： Approved By Checked By Prepared By Product Specification P/N: Rev.: A Page: 2 Content Content .............................................................................................................................................................. 2 1. Product Application/产品应用 ...................................................................................................................... 3 2. The test environment, equipment/测试环境、设备 ..................................................................................... 3 3. Technology Parameters/技术参数 ................................................................................................................ 6 4. Antenna Engineer drawing/工程图纸 ........................................................................................................... 7 5. Environmental Performance/环境性能 ......................................................................................................... 9 6. Usage Precaution/使用禁忌或注意事项 .................................................................................................... 10 Product Specification P/N: Rev.: A Page: 3 1. Product Application/产品应用 This antenna product is used for the transmission of 2400~2500MHz signals. 该天线产品用于2400~2500MHz信号的传输。 2. The test environment, equipment/测试环境、设备 Item 项目 Description 项目描述 Test Condition/测试条件 Requirement /规格要求 2.1 Passive testing /无源测试 The VSWR measurement devices are connected in sequence: Agilent5071B Network Analyzer →measurement Cable → Customer-providing Devices. （VSWR测量 装置依次连接：网络分析仪测量电缆 agilent5071B→→客户提供终端。） Standing wave ratio 驻波比： 2400~2500MHz<2.0 impedance阻抗： 50 oh Test equipment/测试设备 Item 项目 Description 项目描述 Test Condition/测试条件 Requirement /规格要求 2.2 增益及 效率测试 Follow picture shows the measurement condition of the antenna been put on the measurement device, which is used for all measurement of electric performances. （以下图片显示的天线的测量条 件被放在测量装置，它是用于所有 的测量电性能。） Antenna gain天线增益： 2400~2500MHz:0.5dBi±1dBi Antenna efficiency天线效率： 2400~2500MHz>25% Product Specification P/N: Rev.: A Page: 4 2.3 Microwave Anechoic （Satimo&ETS ） /微波暗室 Test equipment/测试设备 Product Specification P/N: Rev.: A Page: 5 2.4 CMW500 Agilent5071B AgilentE4405B Agilent8960 Product Specification P/N: Rev.: A Page: 6 3.Technology Parameters/技术参数 Frequency Range/频率范围： 2400-2500MHz Operating Humidity/工作湿度： 85% R.H.MAX Temperature Rating/温度范围：-40°C～+85°C 3.1 The matching test value/调试匹配值 我司没有对天线的匹配电路做调试 3.2 VSWR/驻波比: Element Value E1(0402) E2(0402) E3(0402) E4(0402) Product Specification P/N: Rev.: A Page: 7 Product Specification P/N: Rev.: A Page: 8 3.3. Efficiency And Gain/效率和增益 Frequency / MHz Efficiency / dB Efficiency / % Gain/ dBi 2400 -5.2 30.2 0.45 2410 -5.34 29.24 0.38 2420 -5.12 30.76 0.76 2430 -5.28 29.65 0.39 2440 -5.52 28.05 -0.14 2450 -5.33 29.31 -0.15 2460 -5.2 30.2 -0.13 2470 -5.4 28.84 -0.29 2480 -5.34 29.24 -0.08 2490 -5.18 30.34 -0.19 2500 -5.35 29.17 -0.55 Product Specification P/N: Rev.: A Page: 9 3.4.Product Picture/产品实物图片 Product Specification P/N: Rev.: A Page: 10 4.1 2D/3D Pattern/2D/3D方向图: Product Specification P/N: Rev.: A Page: 11 Product Specification P/N: Rev.: A Page: 12 Product Specification P/N: Rev.: A Page: 13 Product Specification P/N: Rev.: A Page: 14 Product Specification P/N: Rev.: A Page: 15 5.Envnmental Performance/环境性能 Item 项目 Description 项目描述 Test Condition测试条件 Requirement 规格要求 5.1 High and low temperatur e test 高低温测试 Temp.: -40 °C Time: 48 hours Temp.: 85°C Time: 48 hours 1. No visible damage. （无可见损伤） 2. The electric performances reach the standard. （电气性能达标） Item 项目 Description 项目描述 Test Condition测试条件 Requirement 规格要求 Product Specification P/N: Rev.: A Page: 16 5.2 Salt Spray 盐雾测试 5±0.1% Nad salt fog PH Value: 6.5-7.2 Temp: 35±1°C Time:24 hours 1. No color change. （无颜色变化） 2. the appearance of the antenna does not flake off. （天线无外观脱落） 6.Usage Precaution/使用禁忌或注意事项 No Items项目 Matter事项 6.1 Precautions 禁忌 a)Please avoid the cleaning of this product a)请避免清洁此产品 No Items项目 Matter事项 6.2 Stockpile condition 存储条件 Use this product within 6 months after receipt Condition : Temp: 5~30°C Humidity:≤70% 有效期：请在产品接收后的6个月内使用 存储环境: 温度:5~30°C; 湿度:≤70%

Test Model No.: RTX‐4C Radiated Emission