2BKZ5-YG475Alloy Engineering Remote Control Series

SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY Rev 2026-04-24 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-11-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) and Part 2.911(d)(5)(ii) FCC ID: 2BKZ5-YG475 Part 2.911(d)(5)(i) [SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment and does not contain anti-virus software or cybersecurity software prohibited from receiving an equipment authorization pursuant to 47 CFR 2.903, KDB 986446 D01 Covered Equipment Guidance, and FCC Covered List (www.fcc.gov/supplychain/coveredlist). Part 2.911(d)(5)(ii) [SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY] (“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. Sincerely, (Applicant signature) (Jiecheng Zhang)

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Rev 11/20/07 SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY Federal Communications Commission Authorization and Evaluation Division Date: 09-11-2026 Confidentiality Request regarding application for certification of FCC ID: 2BKZ5-YG475 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name* Block Diagram, Schematics, Operational Description Block.pdf, SCH.pdf, Operation description- BT.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission’s public notice, we also request 45 days temporary confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name* (External Photos, Internal Photos, Test Setup Photos, User Manual) (External photos.pdf, Internal Photos.pdf, Test Setup Photos.pdf, User Manual.pdf) Sincerely, (signature) (Jiecheng Zhang)

E:\001项目\1已交\TZ0035260742 优检 亿工 遥控推土机 YG475 FCC ID,FCC SDOC+声明 30845-26\TCF Word\FCC POA Letter.docx SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Date: 09-11-2026 SUBJECT: FCC Application for FCC ID: 2BKZ5-YG475 To Whom It May Concern: We, the undersigned, hereby authorize Max Zhang at Shenzhen Tongzhou Testing Co.,Ltd. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Shenzhen Tongzhou Testing Co.,Ltd. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, (Jiecheng Zhang)

Label Location 20mm*10mm FCC ID: 2BKZ5-YG475

FCC ID: 2BKZ5-YG475 Page 1 of 2 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd RADIO FREQUENCY EXPOSURE Limit According to section B.4 of 447498 D04 Interim General RF Exposure Guidance v01 SAR-based thresholds are derived based on frequency, power, and separation distance of the RF source. The formula defines the thresholds in general for either available maximum time-averaged power or maximum time-averaged ERP, whichever is greater. If the ERP of a device is not easily determined, such as for a portable device with a small form factor, the applicant may use the available maximum time-averaged power exclusively if the device antenna or radiating structure does not exceed an electrical length of λ/4. As for devices with antennas of length greater than λ/4 where the gain is not well defined, but always less than that of a half-wave dipole (length λ/2), the available maximum time-averaged power generated by the device may be used in place of the maximum time-averaged ERP, where that value is not known. The separation distance is the smallest distance from any part of the antenna or radiating structure for all persons, during operation at the applicable ERP. In the case of mobile or portable devices, the separation distance is from the outer housing of the device where it is closest to the antenna. The SAR-based exemption formula of § 1.1307(b)(3)(i)(B), repeated here as Formula (B.2), applies for single fixed, mobile, and portable RF sources with available maximum time-averaged power or effective radiated power (ERP), whichever is greater, of less than or equal to the threshold Pth (mW). This method shall only be used at separation distances from 0.5 cm to 40 cm and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by Formula (B.2). Where and f is in GHz, d is the separation distance (cm), and ERP 20cm is per Formula (B.1). FCC ID: 2BKZ5-YG475 Page 2 of 2 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Results RF Exposure at Separation distance (cm): 0.5 Mode Antenna Frequency [MHz] Conducted Power [dBm] Manufacturing tolerance Antenna Gain [dBi] Max of ERP and Conducted Power including Tune Up SAR- based exemption threshold Pth [mW] Target Power [dBm] Tolerance ±[dB] [dBm] [mW] SRD Ant1 2408 0.71 0 1 0.59 1 1.26 2.78 SRD Ant1 2442 1.45 1 1 0.59 2 1.58 2.75 SRD Ant1 2475 1.33 1 1 0.59 2 1.58 2.72 Max of ERP and Conducted Power including Tune Up (dBm) = Max Conducted Tune Up Power(dBm) and Max Conducted Tune Up Power(dBm) + Antenna Gain(dBi)-2.15), whichever is greater. The Maximum Erp is used for Routine Evaluation Exemption according to B.4 of 447498 D04 Interim General RF Exposure Guidance v01. So, the SAR evaluation is not required.

天線規格承認書 Acceptanceofantennaspecifications 制造商： Manufacturer ： 規格 ： Specifications： 產品料號： PartNO.: 汕头市龙湖区科马电子加工场 ShantouLonghuDistrictKomaElectronicProcessing Factory 2.4G天線全長40MM 透明 17芯*0.12*1.38PVC 地址: 汕头市龙湖区新津街道金泰街22号二楼 No.22,JintaiStreet,XinjinSub-district,LonghuDistrict, ShantouCity,SecondFloor Address： 图示： ProductSpecification A.Electrical Characteristics Frequency 2400MHz ~2500MHz VSWR <3.0 Efficiency >20% Impedance 50 Ohm Gain 0.59 DBi Polarization mode: linear polarization B.Material & Mechanical Characteristics Material of Radiator Cu Cable Type 1.4 white Connector Type : NO Dimension C.Environmental Operation Temperature - 30 °C ~ + 80 °C Storage Temperature - 30 °C ~ + 85 °C Test Equipment& Conditions 1.NetworkAnalyzers: Agilent8753D5071B 2. CommunicationsTest Set: AgilentE5515C 3. 3D ChamberTest System Effiency&Gain Freq (MHz) Effi (%) Gain (dBi) 2400 23.660.47 2410 23.190.38 2420 23.030.49 2430 22.410.42 2440 21.670.45 2450 20.240.52 2460 20.610.51 2470 21.410.59 2480 23.890.56 2490 26.460.53 2500 25.730.46 RadiationPattern 70 70 5.00 2450.000MHzE1 5.00 2450.000MHzE2 5.00 2500.000MHz 2500.000MHzH 2.2 1.2 -O.3 -1.8 -3.8 -5.8 -7.8 2500.000MHzE1 2500.000MHzE2 70 g 70 70 9 9 g

Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 1 of 23 Appendix Test Data for SRD (Conducted Measurement) Product Name: Alloy Engineering Remote Control Series Trade Mark: / Test Model: YG475 FCC ID: 2BKZ5-YG475 Environmental Conditions Temperature: 23.5°C Relative Humidity: 58% ATM Pressure: 100.0 kPa Test Engineer: Allen Lai Supervised by: Max Zhang NOTE N/A Appendix A: DTS Bandwidth Test Result Test Mode Antenna Frequency [MHz] DTS BW [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict SRD Ant1 2408 0.640 2407.692 2408.332 0.5 PASS SRD Ant1 2442 0.696 2441.648 2442.344 0.5 PASS SRD Ant1 2475 0.756 2474.652 2475.408 0.5 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 2 of 23 Test Graphs SRD-Ant1-2408-PASS SRD-Ant1-2442-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 3 of 23 SRD-Ant1-2475-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 4 of 23 Appendix B: Occupied Channel Bandwidth Test Result Test Mode Antenna Frequency [MHz] OCB [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict SRD Ant1 2408 1.1768 2407.4125 2408.5893 --- --- SRD Ant1 2442 1.2033 2441.4040 2442.6073 --- --- SRD Ant1 2475 1.2319 2474.3963 2475.6282 --- --- Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 5 of 23 Test Graphs SRD-Ant1-2408 SRD-Ant1-2442 Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 6 of 23 SRD-Ant1-2475 Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 7 of 23 Appendix C: Maximum peak conducted output power Test Result Peak Test Mode Antenna Frequency [MHz] Conducted Peak Power [dBm] Conducted Limit [dBm] Verdict SRD Ant1 2408 0.71 ≤30 PASS SRD Ant1 2442 1.45 ≤30 PASS SRD Ant1 2475 1.33 ≤30 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 8 of 23 Test Graphs Peak SRD-Ant1-2408-PASS SRD-Ant1-2442-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 9 of 23 SRD-Ant1-2475-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 10 of 23 Appendix D: Maximum peak power spectral density Test Result Test Mode Antenna Frequency [MHz] Result [dBm/3kHz] Limit [dBm/3kHz] Verdict SRD Ant1 2408 -14.49 ≤8.00 PASS SRD Ant1 2442 -13.30 ≤8.00 PASS SRD Ant1 2475 -14.06 ≤8.00 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 11 of 23 Test Graphs SRD-Ant1-2408-PASS SRD-Ant1-2442-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 12 of 23 SRD-Ant1-2475-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 13 of 23 Appendix E: Band edge measurements Test Result Test Mode Antenna Ch. Name Frequency [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict SRD Ant1 Low 2408 -0.47 -47.09 ≤-20.47 PASS SRD Ant1 High 2475 -0.42 -46.04 ≤-20.42 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 14 of 23 Test Graphs SRD-Ant1-2408-PASS SRD-Ant1-2475-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 15 of 23 Appendix F: Conducted Spurious Emission Test Result Test Mode Antenna Frequency [MHz] Freq. Range [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict SRD Ant1 2408 0~Reference -0.35 -0.35 --- PASS SRD Ant1 2408 30~1000 -0.35 -62.23 ≤-20.35 PASS SRD Ant1 2408 1000~26500 -0.35 -37.5 ≤-20.35 PASS SRD Ant1 2442 0~Reference 0.27 0.27 --- PASS SRD Ant1 2442 30~1000 0.27 -62.93 ≤-19.73 PASS SRD Ant1 2442 1000~26500 0.27 -37.54 ≤-19.73 PASS SRD Ant1 2475 0~Reference 0.07 0.07 --- PASS SRD Ant1 2475 30~1000 0.07 -62.99 ≤-19.93 PASS SRD Ant1 2475 1000~26500 0.07 -37.64 ≤-19.93 PASS Note: offset(dB) in Reference test plots = cable loss(dB) + attenuator factor(dB); For spurious emissions plots from 30MHz to 26.5GHz, the cable loss and attenuator factors have been set in the 'Input Correction' of the Spectrum Analyzer during the test. Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 16 of 23 Test Graphs SRD-Ant1-2408-0~Reference-PASS SRD-Ant1-2408-30~1000-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 17 of 23 SRD-Ant1-2408-1000~26500-PASS SRD-Ant1-2442-0~Reference-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 18 of 23 SRD-Ant1-2442-30~1000-PASS SRD-Ant1-2442-1000~26500-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 19 of 23 SRD-Ant1-2475-0~Reference-PASS SRD-Ant1-2475-30~1000-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 20 of 23 SRD-Ant1-2475-1000~26500-PASS Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 21 of 23 Appendix G: Duty Cycle Test Result Test Mode Antenna Frequency [MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor [dB] SRD Ant1 2408 0.22 0.61 36.07 4.43 SRD Ant1 2442 0.22 0.61 36.07 4.43 SRD Ant1 2475 0.22 0.61 36.07 4.43 Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 22 of 23 Test Graphs NTNV-SRD-Ant1-2408 NTNV-SRD-Ant1-2442 Appendix Test Data of the Report No.: TZ0035260742FRF02 Page 23 of 23 NTNV-SRD-Ant1-2475

Report No.: TZ0035260742FRF12 Page 1 of 33 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Tongzhou Testing Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Tongzhou Testing Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. The test report apply only to the specific sample(s) tested under stated test conditions. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. TEST REPORT Report Number : TZ0035260742FRF12 Product Name : Alloy Engineering Remote Control Series Model/Type reference : YG475 FCC ID : 2BKZ5-YG475 Prepared for : SHANTOU CHENGHAI DISTRICT YI GONG TOYS FACTORY NO.4, LANE13, MEILE 2ND ROAD, CHENGHAI DISTRICT, SHANTOU CITY, GUANGDONG PROVINCE, CHINA Prepared By : Shenzhen Tongzhou Testing Co.,Ltd. 1st Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China Standards : FCC CFR Title 47 Part 15C, ANSI C63.10-2020 + Cor.1-2023 Date of Test : 2026-08-04 ~ 2026-08-17 Date of Issue : 2026-08-18 Prepared by : Nancy Li Reviewed by : Allen Lai Approved by : Max Zhang (Authorized Officer) Report No.: TZ0035260742FRF12 Page 2 of 33 ** Report Revise Record ** Report Version Revise Time Issued Date Valid Version Notes V1.0 / 2026-08-18 Valid Initial release Report No.: TZ0035260742FRF12 Page 3 of 33 TABLE OF CONTENTS 1. G E N E R A L I N F O R M A T I O N ........................................................ 4 1.1. Client Information ................................................................................................................... 4 1.2. Description of Device (EUT) ................................................................................................... 4 1.3. Wireless Function Tested in this Report .............................................................................. 4 1.4. EUT configuration ................................................................................................................... 5 1.5. Description of Test Facility .................................................................................................... 5 1.6. Statement of the Measurement Uncertainty ......................................................................... 6 1.7. Measurement Uncertainty ...................................................................................................... 6 1.8. Description of Test Modes ..................................................................................................... 6 1.9. Frequency of Channels .......................................................................................................... 7 2. T E S T M E T H O D O L O G Y ............................................................ 8 2.1. EUT Configuration .................................................................................................................. 8 2.2. EUT Exercise ........................................................................................................................... 8 2.3. Test Sample ............................................................................................................................. 8 3. S Y S T E M T E S T C O N F I G U R A T I O N .............................................. 9 3.1. Justification ............................................................................................................................. 9 3.2. EUT Exercise Software ........................................................................................................... 9 3.3. Special Accessories ............................................................................................................... 9 3.4. Block Diagram/Schematics .................................................................................................... 9 3.5. Equipment Modifications ....................................................................................................... 9 3.6. Test Setup ................................................................................................................................ 9 4. S U M M A R Y O F T E S T R E S U L T S ................................................ 10 5. T E S T R E S U L T ..................................................................... 11 5.1. On Time and Duty Cycle ....................................................................................................... 11 5.2. Maximum Peak Conducted Output Power Measurement ................................................. 12 5.3. Power Spectral Density Measurement ................................................................................ 13 5.4. 6 dB Spectrum Bandwidth and Occupied Channel Bandwidth Measurement ............... 14 5.5. Radiated Emissions Measurement ...................................................................................... 15 5.6. Conducted Spurious Emissions and Band Edges Test .................................................... 24 5.8. Band-edge measurements for radiated emissions ........................................................... 28 5.9. Antenna Requirements ......................................................................................................... 31 6. L I S T O F M E A S U R I N G E Q U I P M E N T .......................................... 32 7. T E S T S E T U P P H O T O G R A P H S O F E U T ...................................... 33 8. E X T E R I O R P H O T O G R A P H S O F E U T ......................................... 33 9. I N T E R I O R P H O T O G R A P H S O F E U T .......................................... 33 Report No.: TZ0035260742FRF12 Page 4 of 33 1. G E N E R A L I N F O R M A T I O N 1.1. Client Information Applicant : SHANTOU CHENGHAI DISTRICT YI GONG T…

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