2BUSC-ES601Electric scooter

Yongkang Qibu Technology Co., LTD Floor 4, Block 11-1, Shantouli Small and Micro Enterprise Park (Phase I), Longshan Town, Yongkang City, Jinhua City, Zhejiang ( Province ) U.S. Agent Letter of Attestation 7435 Oakland Mills Road, Columbia, MD 21046, USA To: Federal Communications Commission Date: Feb. 4, 26 [ HOPEKCORPORATIONINC]("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 Ref: Attestation Statement –Part2.911(d)(7) filing FCC ID: 2BUSC-ES601 [ Yongkang Qibu Technology Co., LTD](“the applicant”) certifies that, as of the date of the filing of the application,[ HOPEKCORPORATIONINC](“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. address. Signature: Email: H Designated U.S. Agent Company Name:HOPEKCORPORATIONINC FRN: 0034562900 GC: N/A Address: 16755CoyoteBushDrUnit84,SanDiego,CA92127UnitedStates Contact Person: YangyangXu Tel:[email protected] Applicant Company Name: Yongkang Qibu Technology Co., LTD Address: Floor 4, Block 11-1, Shantouli Small and Micro Enterprise Park (Phase I), Longshan Town, Yongkang City, Jinhua City, Zhejiang Province FRN: 0037971934 Signature: Contact Person: JunXing Lv Tel: 18777973672 Email: [email protected]

(Yongkang Qibu Technology Co., LTD) (February 3, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2BUSC-ES601) [Yongkang Qibu 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name) JunXing Lv (Yongkang Qibu Technology Co., LTD) (February 3, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2BUSC-ES601) [Yongkang Qibu 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 an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) JunXing Lv

Yongkang Qibu Technology Co., LTD Model Difference Data: February 3, 2026 Product description: Electric scooter Model name: ES601, ES601QD Trade Name: / FCC ID: 2BUSC-ES601 All the model are the same circuit and RF module, only the model name are different. Regards Sincerely Client’s signature: Client’s name / title: JunXing Lv (Manager) Contact information / address: Floor 4, Block 11-1, Shantouli Small and Micro Enterprise Park (Phase I), Longshan Town, Yongkang City, Jinhua City, Zhejiang Province

Yongkang Qibu Technology Co., LTD (February 3, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize ( Shenzhen DACE Testing Technology Co., Ltd.) 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). This agreement expires one year from the current date. Sincerely, Signature: Name: JunXing Lv Title: Manager

Yongkang Qibu Technology Co., LTD ( February 3, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Electric scooter / ES601, ES601QD / FCC ID: 2BUSC-ES601) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☒ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: JunXing Lv Title: Manager

External Appendix Model: ES601 FCC ID: 2BUSC-ES601

Label Location: Electric scooter Model: ES601 FCC ID: 2BUSC-ES601

Yongkang Qibu Technology Co., LTD FCC ID: 2BUSC-ES601 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. EDR: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 6.53 4.507±18.006.31<51.955763.00YES 2.441 6.02 4.007±18.006.31<51.971583.00YES 2.480 6.12 4.097±18.006.31<51.987273.00YES 2.402 5.68 3.705±16.003.98<51.234003.00YES 2.441 4.6 2.885±16.003.98<51.243983.00YES 2.480 4.88 3.085±16.003.98<51.253883.00YES GFSK (π /4)DQPS K BLE: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 4.99 3.165±16.00 3.98<51.234003.00YES 2.44 4.22 2.645±16.003.98 <51.24373 3.00YES 2.480 4.39 2.755±16.00 3.98<51.253883.00YES 2.402 4.96 3.135±16.003.98<51.23400 3.00YES 2.44 3.8 2.40 4±15.003.16<50.987933.00YES 2.480 3.89 2.45 4±15.003.16<50.995993.00YES GFSK(1M Hz) GFSK(2M Hz) Conclusion: For the max result: 1.98727 Limit 3.0 for 1g SAR.

Application Note AN043 Small Size 2.4 GHz PCB antenna By Audun Andersen 1 KEYWORDS •CC25xx •CC24xx •CC2480 •PCB antenna •USB dongle • 2.4 GHz •Inverted F Antenna 2 INTRODUCTION The PCB antenna used on the CC2511 USB dongle reference design is described in this application note. Even if the antenna presented is for a USB dongle design it can be used in all 2.4 GHz designs, especially where small space is required for the antenna. This application note describes the antenna dimensions, the RF performance and considerations for complying with regulatory limits when using this design. The suggested antenna design requires no more than 15.2 x 5.7 mm of space and ensures a VSWR ratio of less than 2 across the 2.4 GHz ISM band when connected to a 50 ohm source. Figure 1: CC2511 USB Dongle SWRA117D Page 1 of 21 Application Note AN043 Table of Contents 1 KEYWORDS...................................................................................................................1 2 INTRODUCTION.............................................................................................................1 3 ABBREVIATIONS...........................................................................................................2 4 ANTENNA DESIGN........................................................................................................3 4.1 DESIGN GOALS..........................................................................................................3 4.2 SIMULATION...............................................................................................................3 4.3 LAYOUT AND IMPLEMENTATION...................................................................................4 5 TEST RESULTS.............................................................................................................5 5.1 REFLECTION..............................................................................................................5 5.2 RADIATION PATTERN..................................................................................................7 5.3 OUTPUT POWER......................................................................................................15 5.4 SPURIOUS EMISSION AND HARMONICS......................................................................17 6 CONCLUSION ..............................................................................................................20 7 GENERAL INFORMATION..........................................................................................21 7.1 DOCUMENT HISTORY................................................................................................21 3 ABBREVIATIONS CAD Computer Aided Design CC24xx CC2400, CC2420, CC2430 and CC2431 CC25xx CC2500, CC2510, CC2511, CC2550 and CC2520 CC2480 Z-Accel ZigBee Processor IFA Inverted F Antenna ISM Industrial, Scientific and Medical LOS Line Of Sight PCB Printed Circuit Board PER Packet Error Rate VSWR Voltage Standing Wave Ratio SWRA117D Page 2 of 21 Application Note AN043 4 ANTENNA DESIGN The PCB antenna on the CC2511 USB dongle reference design is a meandered Inverted F Antenna (IFA). The IFA was designed to match an impedance of 50 ohm at 2.45 GHz. Thus no additional matching components are necessary. 4.1 Design Goals The reflection at the feed point of the antenna determines how much of the applied power is delivered to the antenna. A reflection of less than -10 dB across the 2.4 GHz ISM band, when connected to a 50 ohm source, was a design goal. Reflection of less than -10 dB, or VSWR less than 2, ensures that more than 90% of the available power is delivered to the antenna. Bandwidth is in this document defined as the frequency band where more than 90% of the available power is delivered to the antenna. Another design goal was to fit the size of the PCB antenna on a USB dongle and to obtain good performance also when the dongle is connected to a computer. 4.2 Simulation IE3D from Zeland, which is an electromagnetic simulation tool, was used to design the antenna. The accuracy of the simulation is controlled by the mesh. An increase of the mesh increases the simulation time. Thus, for initial simulations mesh = 1 should be used. When a fairly good result is achieved a higher mesh should be used to obtain more accurate results. Comparison of simulation and measurement results shows that the measured reflection is between the result obtained with mesh = 5 and mesh = 1; see Figure 2 for details. Figure 2: Comparison of Simulation and Measurements Results SWRA117D Page 3 of 21 Application Note AN043 4.3 Layout and Implementation Small changes of the antenna dimensions may have large impact on the performance. Therefore it is strongly recommended to make an exact copy of the reference design to achieve optimum performance. The easiest way to implement the antenna is to import the gerber or DXF file showing the antenna layout. These files are named IFA_USB.spl and IFA_USB.dxf respectively and are included in the CC2511 USB dongle reference design available from http://www.ti.com\lpw. The imported file can be used as a template when drawing the antenna. By using this procedure it should be possible to make an exact copy. If the PCB CAD tool being used does not support import of DXF or gerber files, Figure 3 and Table 1 should be used to ensure correct implementation. It is recommended to generate a gerber file for comparison with IFA_USB.spl when making a manual implementation. Most gerber viewers have the possibility to import several gerber files at the same time. Thus by placing the gerber file, showing the manually implemented antenna, on top of IFA_USB.spl it is easy to verify that the antenna is correctly implemented. It is also recommended to use the same thickness and type of PCB material as used in the reference design. Information about the PCB can be found in a separate readme file included in the reference design. To compensate for a thicker/thinner PCB the…

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V1.0 Report No.: DACE260123010RL002 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.com Tel: +86-755-23010613 E-mail: [email protected] Page 1 of 73 RF TEST REPORT For Yongkang Qibu Technology Co., LTD Product Name: Electric scooter Test Model(s): ES601 Re port Reference No. : DACE260123010RL002 FCC ID : 2BUSC- ES601 Ap plicant’s Name : Yongkang Qibu Technology Co., LTD Address : Floor 4, Block 11-1, Shantouli Small and Micro Enterprise Park (Phase I), Longshan Town, Yongkang City, Jinhua City, Zhejiang Province Te sting Laboratory : Shenzhen DACE Testing Technology Co., Ltd. Address : 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Test Specification Standard : 47 CFR Part 15.247 Da te of Receipt : January 23, 2026 Date of Test : January 23, 2026 to January 27, 2026 Date of Issue : January 28, 2026 Result : Pass Not e: This report shall not be reproduced except in full, without the written approval of Shenzhen DACE Testing Technology Co., Ltd. This document may be altered or revised by Shenzhen DACE Testing Technology Co., Ltd. personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample V1.0 Report No.: DACE260123010RL002 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.com Tel: +86-755-23010613 E-mail: [email protected] Page 2 of 73 Apply for company information Applicant’s Name : Yongkang Qibu Technology Co., LTD Address : Floor 4, Block 11-1, Shantouli Small and Micro Enterprise Park (Phase I), Longshan Town, Yongkang City, Jinhua City, Zhejiang Province Product Name : Electric scooter Test Model(s) : ES601 Series Model(s) : ES601QD Test Specification Standard(s) : 47 CFR Part 15.247 NOTE1: The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. If the product in this report is used in any configuration other than that detailed in the report, the manufacturer must ensure the new system complies with all relevant standards. Compiled by: Supervised by: Approved by: Amy Zhu / Test Engineer Stone Yin / Project Engineer Tom Chen / Manager January 28, 2026 January 28, 2026 January 28, 2026 V1.0 Report No.: DACE260123010RL002 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.com Tel: +86-755-23010613 E-mail: [email protected] Page 3 of 73 Revision History Of Report Version Description REPORT No. Issue Date V1.0 Original DACE260123010RL002 January 28, 2026 V1.0 Report No.: DACE260123010RL002 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.com Tel: +86-755-23010613 E-mail: [email protected] Page 4 of 73 CONTENTS 1 TEST SUMMARY ........................................................................................................................................... 6 1.1 TEST STANDARDS .................................................................................................................................. 6 1.2 SUMMARY OF TEST RESULT .................................................................................................................... 6 2 GENERAL INFORMATION ............................................................................................................................ 7 2.1 CLIENT INFORMATION ............................................................................................................................. 7 2.2 DESCRIPTION OF DEVICE (EUT) .............................................................................................................. 7 2.3 DESCRIPTION OF TEST MODES ................................................................................................................ 7 2.4 DESCRIPTION OF SUPPORT UNITS ........................................................................................................... 7 2.5 OPERATION FREQUENCY EACH OF CHANNEL ............................................................................................ 8 2.6 EQUIPMENTS USED DURING THE TEST .................................................................................................... 9 2.7 STATEMENT OF THE MEASUREMENT UNCERTAINTY ................................................................................ 11 3 EVALUATION RESULTS (E VA L U AT I O N ) ................................................................................................... 12 3.1 ANTENNA REQUIREMENT ....................................................................................................................... 12 3.1.1 Conclusion: ............................................................................................................................. 12 4 RADIO SPECTRUM MATTER TEST RESULTS (RF) ................................................................................. 13 4.1 CONDUCTED EM I S S I O N AT AC POWER LINE ........................................................................................... 13 4.1.1 E.U.T. Operation: .................................................................................................................... 13 4.1.2 Test Setup Diagram: ............................................................................................................... 13 4.1.3 Test Data: ............................................................................................................................... 14 4.2 6DB BANDWI…

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Setup Appendix Model: ES601 FCC ID: 2BUSC-ES601