2AS5R-ZNNF90DOORBELL

Shenzhen Zhongnuoneng Technology Co., Ltd Covered Equipment Certification Attestation Letter 4/23/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AS5R-ZNNF90 Shenzhen Zhongnuoneng 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. Shenzhen Zhongnuoneng 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. Signed: Printed name: Sharon Wang Title: Director Company Name: Shenzhen Zhongnuoneng Technology Co., Ltd Date: 4/23/2023

Shenzhen Zhongnuoneng 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 4/23/2023 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2AS5R-ZNNF90 FRN of Grantee: 0028422715 Per section 2.911(d)(7) of the FCC rules, Shenzhen Zhongnuoneng Technology Co., Ltd (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Stariver Consulting Company FCC Registration Number (FRN): 0033400433 U.S. Company Address: 2363 James St #1098 Syracuse, NY 13206, USA Agent Name: Chong He 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: Agent Signed Signed: Printed name: Sharon Wang Title: Director Company Name: Shenzhen Zhongnuoneng Technology Co., Ltd Date: 4/23/2023 Signed: Printed name: Chong He Title: Manager Company Name: Stariver Consulting Company Date: 4/23/2023

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April 23, 2023 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AS5R-ZNNF90 Product Name: DOORLELL Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: • 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：Sharon Wang Title：Director Applicant Company：Shenzhen Zhongnuoneng Technology Co., Ltd

Shenzhen Zhongnuoneng Technology Co., Ltd Statement We Shenzhen Zhongnuoneng Technology Co., Ltd Hereby Declare that The product DOORLELL, models no. ZNNF90, F90, F90A, F90B, F90C are all identical in interior structure, electrical circuits and components, and just the model names are different for the marketing requirement. Your assistance on this matter is highly appreciated. Yours sincerely, Signature: <Signature>： Name：Sharon Wang Title：Director

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Acc eir whe pt gt E = d = Sop Ant Fie So <2. The ording to p = pt x re: = transmi = numeri c = electric = measurem t = (EXd) t gain = eld stre Pt={ [1 .76 mW n SAR eva o 447498 D gt = (EXd tter outp c gain of c field st ment dista 2 /30 x gt =4.39dBi ngth =8 7 0 (87.98/20) aluation i RF Expo D04 Interi d) 2 /30 put power the tran s trength in ance in me so Ant 7.98dBμV /10 6 x3 s not req osure eval im General in watts, smitting a n V/m, --- eters (m)- numeric V/m @3m@2 3] 2 /30x2. quired luation l RF Expos antenna (u - 10 ((dBuV ---3m c gain= 2 2440MHz .748}x100 sure Guida unitless), V/m)/20) /10 6 2.748 00 mW = ance v01 0.07mW =2.24dBd（1.675） So ERP=0.07X1.675=0.12mW

Report No.: TW2303152E Applicant: Shenzhen Zhongnuoneng Technology Co., Ltd Product: DOORLELL Model No.: ZNNF90, F90, F90A, F90B, F90C Trademark: OWNZNN Test Standards: FCC Part 15.249 Test result: It is herewith confirmed and found to comply with the requirements set up by ANSI C63.10 & FCC Part 15 Subpart C, Paragraph 15.249 regulations for the evaluation of electromagnetic compatibility Approved By Terry Tang Manager Dated: April 06, 2023 Results appearing herein relate only to the sample tested The technical reports is issued errors and omissions exempt and is subject to withdrawal at SHENZHEN TIMEWAY TESTING LABORATORIES Zone C, 1st Floor, Block B, Jun Xiang Da Building, Zhongshan Park Road West, Tong Le Village, Nanshan District, Shenzhen, China Tel (755) 83448688, Fax (755) 83442996, E-Mail:[email protected] Report No.: TW2303152E Page 2 of 47 Date: 2023-04-06 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Special Statement： The testing quality ability of our laboratory meet with "Quality Law of People's Republic of China" Clause 19. The testing quality system of our laboratory meet with ISO/IEC-17025 requirements, which is approved by CNAS. This approval result is accepted by MRA of APLAC. Our test facility is recognized, certified, or accredited by the following organizations: CNAS-LAB Code: L2292 The EMC Laboratory has been assessed and in compliance with CNAS-CL01 accreditation criteria for testing Laboratories (identical to ISO/IEC 17025:2017 General Requirements) for the Competence of testing Laboratories. FCC-Registration No.: 744189 The EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications commission. The acceptance letter from the FCC is maintained in our files. Registration No.: 744189. Industry Canada (IC) —Registration No.:5205A The EMC Laboratory has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 5205A. A2LA (Certification Number:5013.01) The EMC Laboratory has been accredited by the American Association for Laboratory Accreditation (A2LA). Certification Number:5013.01 CAB identifier: CN0033 Report No.: TW2303152E Page 3 of 47 Date: 2023-04-06 The report refers only to the sample tested and does not apply to the bulk. This report is issued in confidence to the client and it will be strictly treated as such by the SHENZHEN TIMEWAY TESTING LABORATORIES. It may not be reproduced rather in its entirety or in part and it may not be used for adverting. The client to whom the report is issued may, however, show or send it . or a certified copy there of prepared by the SHENZHEN TIMEWAY TESTING LABORATORIES. to his customer. Supplier or others persons directly concerned. SHENZHEN TIMEWAY TESTING LABORATORIES. will not, without the consent of the client enter into any discussion of correspondence with any third party concerning the contents of the report. In the event of the improper use of the report. The SHENZHEN TIMEWAY TESTING LABORATORIES. reserves the rights to withdraw it and to adopt any other remedies which may be appropriate. Test Report Conclusion Content 1.0 General Details ............................................................................................... 4 1.1 Test Lab Details................................................................................................ 4 1.2 Applicant Details.............................................................................................. 4 1.3 Description of EUT .......................................................................................... 4 1.4 Submitted Sample............................................................................................. 4 1.5 Test Duration................................................................................................... 5 1.6 Test Uncertainty................................................................................................ 5 1.7 Test By......................................................................................................... 5 2.0 List of Measurement Equipment......................................................................... 6 3.0 Technical Details............................................................................................. 7 3.1 Summary of Test Results.................................................................................... 7 3.2 Test Standards................................................................................................. 7 4.0 EUT Modification............................................................................................ 7 5.0 Power Line Conducted Emission Test.................................................................. 8 5.1 Schematics of the Test....................................................................................... 8 5.2 Test Method and Test Procedure............................................................................ 8 5.3 Configuration of the EUT................................................................................... 8 5.4 EUT Op…

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Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第1页 Antenna specification for approval Customer name: Zhongnuoneng Model: DOORLELL Antenna type :2.4G Antenna Antenna frequency band: 2.4G Material : FPC Color : Black Material Number:F1352A-1L10B-060-A F1353A-1R10B-045-A Production date:2023-04-13 Version：A Admit that signature Confirmation Signature Customer Approved Responsible Responsible QC Engineer Approve Approve Date Date Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第2页 Contents Antenna specification for approval cover ............................1 Contents.......................................................................2 Antenna performance SPEC overview .................................3 Match the circuit diagram, antenna images.....................3-4 VSWR、Efficiency...............................................................4-5 Structural drawings.............................................................6-7 Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第3页 This approval sheet supports for DOORLELL project. FPC antennas include in this project. This report is for the performance of 2.4G antenna. ● Antenna shape size：Meet the requirement of DOORLELL project ● Antenna band：2400MHz~2500MHz ● Antenna material：Antenna material meet the requirement of DOORLELL ● Adhesive performance：Adhesive performance meet the requirement of DOORLELL Antenna performance SPEC overview Description 2.4GHz~2.5GHz Units VSWR ≤2.0 Average Antenna Gain ≥2.0 dB Antenna Efficiency ≥50 % Feed Impedance 50 ohms Operating Temperature -40 to +85 deg C Polarization / Azimuth Linear / Omni-directional ● Mechanical Information Mechanical Dimension Cable Length 060/045mm/Black Description 2.4G antenna Material FPC Coaxial Cable 50Ohm/O.D.1.13mm Environmental Operation Temperature -40 to +85 deg C Storage Temperature -40 to +85 deg C 2: Match the circuit diagram, antenna images 2.1 Match the circuit diagram Our company did not modify the antenna matching Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第4页 2.2 Machine and Antenna images 3：VSWR、Efficiency 3.1 VSWR-Ant.#1 Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第5页 VSWR-Ant.#2 3.2 Efficiency-Ant.#1 and Ant.#2 Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第6页 4:Structural drawings Building A1, 3rd Floor, Shangweiyuan New Park Industrial Zone, Xixiang Street, Baoan District, Shenzhen City Tel: 0755-27492635 fax: 0755-27471559 HTTP://WWW.yunxikeji.COM 第7页

Conducted test View-: Radiated emission test view: