2AVYF-DB61Video Doorbell

Hangzhou Huacheng Network Technology Co.,Ltd. Date: 2022-03-03 Declaration Letter about Limited Use To whom it may concern, WE (Hangzhou Huacheng Network Technology Co.,Ltd.) HEREBY DECLARED THAT Our product Product Description: Video Doorbell Model No: DB61i-W-D4 FCC ID: 2AVYF-DB61 IC: 25954-DB61 The Bluetooth function integrated in RF chip RTL8822BS in this device has been disabled by software. Any modification will be highlighted on the release letter, and the impact analysis will also have a review. Verification procedure and verification results will be performed based on the release letter and impact analysis report. Name (Printed): Jian Li Signature: Title: Certification Manager On behalf of Company: Hangzhou Huacheng Network Technology Co.,Ltd. Telephone: 0571-28822025

Applicant Declaration Applicant Declaration Rev: 0.0 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name Hangzhou Huacheng Network Technology Co.,Ltd. Address No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Grantee Code 2AVYF FCC ID 2AVYF-DB61 Authorized Contact Name Jian Li Contact Email [email protected] Contact Phone 0571-28822025 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has r ead, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Applicant Signature: Date: 2022-02-24 Print Name: Jian Li Title: Certification Manager *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

Hangzhou Huacheng Network Technology Co.,Ltd. Current Date: 2022-02-24 To : SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. No. 588 West Jindu Road, Songjiang District, Shanghai, China. 201612 Dear Sir/Madam, Subject: Declaration Letter about Identity of Products *WE (Hangzhou Huacheng Network Technology Co.,Ltd.) HEREBY DECLARED THAT Product Description Video Doorbell Model No. DB61i,DB61i-W-D4-imou,DB61i-W-D4N-imou,DB6I-USA,DB6I-CAN, DB61iXX-XXXX,DB61iXX-XXX-XXXX,DB61iXX-XX-XXX-XXXX,DB6 1iXX-XX-XXX-XXXX-XXXX（X can be “0-9”,“a-z”, “A-Z”or blank ） Manufacturer’s Name Hangzhou Huacheng Network Technology Co.,Ltd. Manufacturer’s Address No.2930, Nanhuan Road, Binjiang District, Hangzhou, China *Except that the model number, trade name, color and appearance deviation, are identical with the original product as follows: Note: The definition of identical should be “electrically identical”. A device will be considered to be electrically identical if no changes are made to the devices’ schematics, board layouts, component layouts, chip sets, resistors and all other electrical aspects of the device are identical. Model No. (型号): DB61i-W-D4 Manufacturer’s Name (生产商名称): Hangzhou Huacheng Network Technology Co.,Ltd. Manufacturer’s Address（生产商商地址): No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Sincerely, Signature (签字): Printed Name (姓名): Jian Li Position/Title (职位): Certification Manager Contact Number (联系电话): 0571-28822025

Hangzhou Huacheng Network Technology Co.,Ltd. Date: 2022-02-24 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: 2AVYF-DB61 To whom it may concern: We, the undersigned, hereby authorize Parlam Zhan to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Hangzhou Huacheng Network Technology Co.,Ltd. This authorizati on is valid until further written notice from the applicant. Name (Printed): Jian Li Title: Certification Manager Signature: On behalf of Company: Hangzhou Huacheng Network Technology Co.,Ltd. Telephone: 0571-28822025

Hangzhou Huacheng Network Technology Co.,Ltd. To: SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia United States From: Hangzhou Huacheng Network Technology Co.,Ltd. No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Regarding: Confidentiality Request regarding application for FCC ID: 2AVYF-DB61 LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions NII Software Security Info The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. Sincerely, Signature: Printed Name (on file with the FCC associated with the Grantee Code): Jian Li Title: Certification Manager Company Name: Hangzhou Huacheng Network Technology Co.,Ltd.

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 1 of 5 External Photos Applicant: Hangzhou Huacheng Network Technology Co.,Ltd. Address of Applicant: No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Equipment Under Test (EUT): Product Name: Video Doorbell Model No.: DB61i-W-D4 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 2 of 5 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 3 of 5 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 4 of 5 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 5 of 5 End

Model: DB61i-W-D4 Model: DB61i Model: DB61i-W-D4-imou Model: DB61i-W-D4N-CAN-imou Model: DB6I-USA Model: DB6I-CAN Label Location Remark：It’s hard to put FCC statement on the product due to device’s irregular appearance. FCC statement will be placed in the user manual which the device is marketed.

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 1 of 326 Appendix B for SHCR220100008902 1. Duty Cycle 1.1 Ant1 1.1.1 Test Result Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) 802.11a SISO 5180 2.064 2.226 92.72 0.33 4.72 5200 2.063 2.235 92.30 0.35 5.12 5240 2.064 2.208 93.48 0.29 3.55 5260 2.056 2.235 91.99 0.36 5.95 5300 2.064 2.208 93.48 0.29 4.80 5320 2.056 2.226 92.36 0.35 5.55 5500 2.064 2.226 92.72 0.33 4.72 5580 2.063 2.217 93.05 0.31 4.79 5700 2.064 2.190 94.25 0.26 4.05 5745 2.057 2.236 91.99 0.36 5.91 5785 2.064 2.235 92.35 0.35 5.53 5825 2.059 2.226 92.50 0.34 5.12 802.11n (HT20) MIMO 5180 1.917 2.072 92.52 0.34 5.05 5200 1.914 2.082 91.93 0.37 5.49 5240 1.920 2.082 92.22 0.35 5.05 5260 1.914 2.090 91.58 0.38 5.88 5300 1.920 2.073 92.62 0.33 4.68 5320 1.911 2.064 92.59 0.33 5.11 5500 1.920 2.082 92.22 0.35 5.04 5580 1.920 2.082 92.22 0.35 5.51 5700 1.920 2.091 91.82 0.37 4.60 5745 1.920 2.055 93.43 0.30 3.42 5785 1.912 2.082 91.83 0.37 5.96 5825 1.920 2.091 91.82 0.37 4.99 802.11n (HT40) MIMO 5190 0.944 1.106 85.35 0.69 10.10 5230 0.942 1.115 84.48 0.73 11.68 5270 0.942 1.115 84.48 0.73 11.64 5310 0.941 1.105 85.16 0.70 10.93 5510 0.944 1.115 84.66 0.72 11.67 5550 0.941 1.105 85.16 0.70 10.97 5670 0.942 1.115 84.48 0.73 11.64 5755 0.944 1.115 84.66 0.72 10.00 5795 0.944 1.097 86.05 0.65 9.39 802.11ac (VHT20) MIMO 5180 1.932 2.067 93.47 0.29 2.92 5200 1.933 2.067 93.52 0.29 3.37 5240 1.932 2.049 94.29 0.26 3.90 5260 1.925 2.103 91.54 0.38 6.28 5300 1.931 2.058 93.83 0.28 4.31 5320 1.928 2.094 92.07 0.36 5.43 5500 1.932 2.104 91.83 0.37 4.97 5580 1.932 2.076 93.06 0.31 4.66 5700 1.923 2.076 92.63 0.33 5.12 5745 1.926 2.085 92.37 0.34 5.47 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 2 of 326 5785 1.923 2.102 91.48 0.39 5.81 5825 1.923 2.103 91.44 0.39 5.83 802.11ac (VHT40) MIMO 5190 0.952 1.114 85.46 0.68 10.03 5230 0.950 1.123 84.59 0.73 11.56 5270 0.950 1.123 84.59 0.73 11.59 5310 0.952 1.114 85.46 0.68 8.34 5510 0.952 1.105 86.15 0.65 9.37 5550 0.952 1.087 87.58 0.58 5.36 5670 0.952 1.105 86.15 0.65 10.20 5755 0.953 1.114 85.55 0.68 9.16 5795 0.952 1.105 86.15 0.65 8.51 802.11ac (VHT80) MIMO 5210 0.460 0.631 72.90 1.37 18.20 5290 0.460 0.631 72.90 1.37 19.87 5530 0.460 0.622 73.95 1.31 18.81 5610 0.461 0.631 73.06 1.36 19.83 5775 0.460 0.613 75.04 1.25 14.46 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 3 of 326 1.1.2 Test Graph 802.11a_LCH_5180MHz_Ant1_NTNV 802.11a_MCH_5200MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 4 of 326 802.11a_HCH_5240MHz_Ant1_NTNV 802.11a_LCH_5260MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 5 of 326 802.11a_MCH_5300MHz_Ant1_NTNV 802.11a_HCH_5320MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 6 of 326 802.11a_LCH_5500MHz_Ant1_NTNV 802.11a_MCH_5580MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 7 of 326 802.11a_HCH_5700MHz_Ant1_NTNV 802.11a_LCH_5745MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 8 of 326 802.11a_MCH_5785MHz_Ant1_NTNV 802.11a_HCH_5825MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 9 of 326 802.11n(HT20)_LCH_5180MHz_Ant1_NTNV 802.11n(HT20)_MCH_5200MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 10 of 326 802.11n(HT20)_HCH_5240MHz_Ant1_NTNV 802.11n(HT20)_LCH_5260MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 11 of 326 802.11n(HT20)_MCH_5300MHz_Ant1_NTNV 802.11n(HT20)_HCH_5320MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 12 of 326 802.11n(HT20)_LCH_5500MHz_Ant1_NTNV 802.11n(HT20)_MCH_5580MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 13 of 326 802.11n(HT20)_HCH_5700MHz_Ant1_NTNV 802.11n(HT20)_LCH_5745MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 14 of 326 802.11n(HT20)_MCH_5785MHz_Ant1_NTNV 802.11n(HT20)_HCH_5825MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 15 of 326 802.11n(HT40)_LCH_5190MHz_Ant1_NTNV 802.11n(HT40)_HCH_5230MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 16 of 326 802.11n(HT40)_LCH_5270MHz_Ant1_NTNV 802.11n(HT40)_HCH_5310MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 17 of 326 802.11n(HT40)_LCH_5510MHz_Ant1_NTNV 802.11n(HT40)_MCH_5550MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 18 of 326 802.11n(HT40)_HCH_5670MHz_Ant1_NTNV 802.11n(HT40)_LCH_5755MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 19 of 326 802.11n(HT40)_HCH_5795MHz_Ant1_NTNV 802.11ac(VHT20)_LCH_5180MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 20 of 326 802.11ac(VHT20)_MCH_5200MHz_Ant1_NTNV 802.11ac(VHT20)_HCH_5240MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 21 of 326 802.11ac(VHT20)_LCH_5260MHz_Ant1_NTNV 802.11ac(VHT20)_MCH_5300MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 22 of 326 802.11ac(VHT20)_HCH_5320MHz_Ant1_NTNV 802.11ac(VHT20)_LCH_5500MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 23 of 326 802.11ac(VHT20)_MCH_5580MHz_Ant1_NTNV 802.11ac(VHT20)_HCH_5700MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 24 of 326 802.11ac(VHT20)_LCH_5745MHz_Ant1_NTNV 802.11ac(VHT20)_MCH_5785MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 25 of 326 802.11ac(VHT20)_HCH_5825MHz_Ant1_NTNV 802.11ac(VHT40)_LCH_5190MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 26 of 326 802.11ac(VHT40)_HCH_5230MHz_Ant1_NTNV 802.11ac(VHT40)_LCH_5270MHz_Ant1_NTNV SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 27 of 32…

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SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR220100008203 Page: 1 of 22 Parlam Zhan Laboratory Manager DFS TEST REPORT Application No.: SHCR2201000082AT FCC ID: 2AVYF-DB61 IC: 25954-DB61 Applicant: Hangzhou Huacheng Network Technology Co.,Ltd. Address of Applicant: No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Manufacturer: Hangzhou Huacheng Network Technology Co.,Ltd. Address of Manufacturer: No.2930, Nanhuan Road, Binjiang District, Hangzhou, China Equipment Under Test (EUT): EUT Name: Video Doorbell Model No.: DB61i-W-D4,DB61i,DB61i-W-D4-imou,DB61i-W-D4N-imou,DB6I- USA,DB6I-CAN,DB61iXX-XXXX,DB61iXX-XXX-XXXX,DB61iXX-XX-XXX- XXXX,DB61iXX-XX-XXX-XXXX-XXXX ( X can be “0-9”, “a-z”, “A-Z” or blank) ¤ ¤ Please refer to section 2 of this report which indicates which model was actually tested and which were electrically identical. Standard(s) : 47 CFR Part 15, Subpart E 15.407 RSS-247 Issue 2, February 2017 KDB 905462 D02 UNII DFS Compliance Procedures New Rules v02 KDB 905462 D03 UNII Clients Without Radar Detection New Rules v01r02 KDB 905462 D04 Operational Modes for DFS Testing New Rules v01 Date of Receipt: 2021-12-19 Date of Test: 2021-12-21 to 2022-01-31 Date of Issue: 2022-02-14 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR220100008203 Page: 2 of 22 For IC Model No.: DB61i-W-D4,DB61i,DB61i-W-D4-imou,DB61i-W-D4N-CAN-imou,DB6I-USA,DB6I-CAN SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR220100008203 Page: 3 of 22 Revision Record Version Description Date Remark 00 Original 2022-02-14 / Authorized for issue by: Micheal Niu / Project Engineer Parlam Zhan / Reviewer SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR220100008203 Page: 4 of 22 2 Test Summary Item Standard Method Requirement Result Channel Move Time 47 CFR Part 15, Subpart E 15.407 KDB 905462 D02 Section 7.8.3 KDB 905462 D02 Section 5.1 Pass Channel Closing Transmission Time 47 CFR Part 15, Subpart E 15.407 KDB 905462 D02 Section 7.8.3 KDB 905462 D02 Section 5.1 Pass Non-occupancy period 47 CFR Part 15, Subpart E 15.407 KDB 905462 D02 Section 7.8.3 KDB 905462 D02 Section 5.1 Pass SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR220100008203 Page: 5 of 22 3 Contents Page 1 COVER PAGE...................................................................................................................................... 1 2 TEST SUMMARY ................................................................................................................................. 4 3 CONTENTS .......................................................................................................................................... 5 4 GENERAL INFORMATION ................................................................................................................. 6 4.1 DETAILS OF E.U.T.......................................................................................................................... 6 4.2 DESCRIPTION OF SUPPORT UNITS ................................................................................................... 7 4.3 TEST LOCATION ............................................................................................................................. 8 4.4 TEST FACILITY ............................................................................................................................... 8 4.5 DEVIATION FROM STANDARDS ........................................................................................................ 8 4.6 ABNORMALITIES FROM STANDARD CONDITIONS ............................................................................... 8 5 EQUIPMENT LIST ............................................................................................................................... 9 6 DYNAMIC FREQUENCY SELECTION ............................................................................................. 10 6.1 APPLICABILITY OF DFS REQUIREMENTS ........................................................................................ 10 6.2 DFS DETECTION THRESHOLDS ..................................................................................................... 11 6.3 DFS RESPONSE REQUIREMENTS .................................................................................................. 11 6.4 PARAMETERS OF RADAR TEST WAVEFORMS .................................................................................. 12 6.4.1 Short Pulse Radar Test Waveforms ...................................................................................... 12 6.4.2 Long Pulse Radar Test Waveform ........................................................................................ 14 6.4.3 Frequency Hopping Radar Test Waveform ........................................................................... 15 6.5 CALIBRATION OF RADAR WAVEFORM ............................................................................................ 16 6.5.1 Radar Waveform Calibration Procedure ............................................................................... 16 6.5.2 Conducted Calibration Setup ................................................................................................ 16 6.6 TEST PROCEDURE ....................................................................................................................... 17 6.7 TEST SETUP ................................................................................................................................ 18 6.8 CHANNEL LOADING ...................................................................................................................... 18 6.9 TEST RESULT .............................................................................................................................. 20 6.9.1 Radar Wav…

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