2BEWX-LD05-TSmart Lock

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(Zhejiang Lingzhu Technology Co., Ltd.) (2026.01.09) 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:2BEWX-LD05-T) [Zhejiang Lingzhu 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) Linyun Li (Zhejiang Lingzhu Technology Co., Ltd.) (2026.01.09) 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:2BEWX-LD05-T) [Zhejiang Lingzhu 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) Linyun Li

Zhejiang Lingzhu Technology Co., Ltd. 2026.01.09 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Smart Lock Trademark: N/A MODEL : LD05-T, LD05-T1, LD05-T2, LD05-T3, USI/DOOR/LOCK/FS/HK, USI/DOOR/LOCK/PS/HK FCC ID : 2BEWX-LD05-T 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 - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Linyun Li / Manager Contact information / address: Room 302, No 1 Building Huace Center, Xihu District, Hangzhou, 310000, China

Zhejiang Lingzhu Technology Co., Ltd. 2026.01.09 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen STS Test Services 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, Client’s signature: Client’s name / title : Linyun Li / Manager Contact information / address: Room 302, No 1 Building Huace Center, Xihu District, Hangzhou, 310000, China

Zhejiang Lingzhu Technology Co., Ltd. Model Difference 2026-01-09 EUT NAME: Smart Lock MODEL : LD05-T, LD05-T1, LD05-T2, LD05-T3, USI/DOOR/LOCK/FS/HK, USI/DOOR/LOCK/PS/HK FCC ID: 2BEWX-LD05-T All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Linyun Li / Manager Contact information / address: Room 302, No 1 Building Huace Center, Xihu District, Hangzhou, 310000, China

Page 1 of 13 Report No.: STS2512377 External Photos Page 2 of 13 Report No.: STS2512377 Page 3 of 13 Report No.: STS2512377 Page 4 of 13 Report No.: STS2512377 Page 5 of 13 Report No.: STS2512377

Size:40*20mm Smart Lock FCC ID: 2BEWX-LD05-T Label location

Page 6 of 13 Report No.: STS2512377 Internal Photos BLE/Thread Antenna Page 7 of 13 Report No.: STS2512377 Page 8 of 13 Report No.: STS2512377 Page 9 of 13 Report No.: STS2512377 Page 10 of 13 Report No.: STS2512377 Page 11 of 13 Report No.: STS2512377 NFC Antenna Page 12 of 13 Report No.: STS2512377 Page 13 of 13 Report No.: STS2512377

Dongguan Youbi Electronics Co., Ltd. Address: Building 79, New Sun Industrial City, Lin Village Community, Tangxia Town, Dongguan City (Dongguan Company) 承 认 书 SPECIFICATION FOR APPROVAL 客 户 名 称 CUSTOMER NAME:涂鸦 产 品 名 称 PRODUCT NAME:2.4G PCB 内置天线 L=65mm+ 端子 客 户 料 号 CUSTOMER P/N: 优比电子料号 UBP/N: UB01C60F1D2690AREV: A MANUFACTURER SIGNATURE CUSTOMER SIGNATURE CHECKED BY: APPROVED BY: DATE: 2022/03/04 1．Specification : 产品主要技术参数产品主要技术参数 Design Specifications Typical 天线形式内置天线接头式 工作频率（working Frequency）2400MHz-2500MHz 平均增益（Average Gain） 3.28dBi 平均效率（ Average efficiency ） 41.75% 电压驻波比（ VSWR ） ＜ 2 极化方式（ Ploriaztion ）线极化 轴比（Axial Ratio） ＼ 辐射方向（Radiation pattern）全向 馈电阻抗（impedance） 50 ohm 功率容量（ Power handling ） 1W 天线接口（ Interface ） Terminal 天线尺寸（ Overal dimensions ） 36.2*4.6*0.35mm 重量（Weight）\ 工作温度（Operatin Temp）-20°C~+70°C 储存温度（Storing Temp）-20°C~+70°C 2.Drawing 3. Test data： Frequency / MHzEfficiency / %Gain/ dB 240035.812.09 241036.982.39 242038.902.80 243040.553.13 244041.693.32 245042.763.69 246044.063.90 247044.463.91 248044.573.82 249044.873.66 250044.673.42 2D、3DRaditation Pattern 2400MHz2450MH z 2500MHzPhi 0 Phi90Theta 90

Page 1 of 2 FCC ID: 2BEWX-LD05-T Conducted emissions RE 30MHz-1GHz Page 2 of 2 FCC ID: 2BEWX-LD05-T Spurious emissions RE 9KHz-30MHz