2ACZU-G2Self-powered Wireless doorbell

Linbell Self-powered Wireless doorbell G2 FCC Information and Copyright This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. 15.19 Labelling requirements. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

SCS-F18: Project and Product Certification Representative Authorization Letter Page 1 of 2 Rev 5.0 775 Montague Expressway Milpitas, CA 95035 Tel: 408-526-1188 Fax: 408-526-1088 Email: [email protected] Project and Product Certification Representative Authorization Letter Reason for Amendment (current / obsolete) Revision History Approved Date From To Initial Release (obsolete) 1.0 1.0 Nov-14-2006 Revised wording (obsolete) 1.0 2.0 Sept–25-2007 Updated company template (obsolete) 2.0 3.0 Jan-31-2012 Updated letter information (obsolete) 3.0 4.0 May-23-2014 Added FCC ID field (current) 4.0 5.0 Sept 16 2014 SCS-F18: Project and Product Certification Representative Authorization Letter Page 2 of 2 Rev 5.0 Wuhan Linptech Co.,Ltd. 2015-12-03 To: SIEMIC, INC. 775 Montague Expressway, Milpitas, CA 95035 USA Dear Sir/Madam, Re: Product Certification Representative Authorization Letter We, ____ Wuhan Linptech Co.,Ltd..__ _hereby authorize SIEMIC, Inc. to act as a Certification Body for certifying for the following project(s): Product： Self-powered Wireless doorbell Trade Name： Linbell Model Name： G2 Serial Model： N/A FCC ID： 2ACZU-G2 Sincerely, Signature Client’s name / title : xiaoke chen / Manager Contact information / address : 13 floor,Huagong High-Tech Building,No.876,Luoyu Road,Hongshan District,Wuhan,Hubei,China

SCS-F19: Confidentiality Request Letter Page 1 of 2 Rev 5.0 775 Montague Expressway Milpitas, CA 95035 Tel: 408-526-1188 Fax: 408-526-1088 Email: [email protected] Confidentiality Request Letter Reason for Amendment (current / obsolete) Revision History Approved Date From To Initial Release (obsolete) 1.0 1.0 Nov-14-2006 Adding CFR 2.459 (obsolete) 1.0 2.0 August – 11 - 2008 Updated company template & Added text box (obsolete) 2.0 3.0 Jan-31-2012 Added IC confidentiality letter form (obsolete) 3.0 4.0 March-26-2015 Corrections to STC form. Added reference to KDB (current) 4.0 5.0 Nov 19 2015 SCS-F19: Confidentiality Request Letter Page 2 of 2 Rev 5.0 Wuhan Linptech Co.,Ltd. 2015-12-03 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD Subject: Permanent Confidentiality Request for FCC ID: 2ACZU-G2 Pursuant to sections 0.457 and 0.459 of CFR 47, we respectfully request permanent confidential treatment of the following Exhibits accompanying this application as: - Block Diagram - Schematics - Operational Description 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 disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Signature Client’s name / title : xiaoke chen / Manager Contact information / address : 13 floor,Huagong High-Tech Building,No.876,Luoyu Road,Hongshan District,Wuhan,Hubei,China

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7

FCC ID LABELING AND LOCATION FCC ID Label Self-powered Wireless doorbell Model NO.: G2 FCC ID: 2ACZU-G2 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID Label Location The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 433.92 ANT

FCC RADIO TEST REPORT FCC ID:2ACZU-G2 Product： Self-powered Wireless doorbell Trade Name： Linbell Model Name： G2 Serial Model： N/A Report No.： NTEK-2015NT1014899F Prepared for Wuhan Linptech Co.,Ltd. 13 floor,Huagong High-Tech Building,No.876,Luoyu Road, Hongshan District,Wuhan,Hubei,China Prepared by Shenzhen NTEK Testing Technology Co., Ltd. 1/F, Building E, Fenda Science Park, Sanwei Community,Xixiang Street Bao’an District, Shenzhen P.R. China Tel.: +86-0755-61156588 Fax.: +86-0755-61156599 Website:www.ntek.org.cn Page 2 of 26 Report No.: NTEK-2015NT1014899F ` TEST RESULT CERTIFICATION Applicant’s name ................. : Wuhan Linptech Co.,Ltd. Address ................................. : 13 floor,Huagong High-Tech Building,No.876,Luoyu Road, Hongshan District,Wuhan,Hubei,China Manufacture's Name ............ : Wuhan Linptech Co.,Ltd. Address ................................. : 13 floor,Huagong High-Tech Building,No.876,Luoyu Road, Hongshan District,Wuhan,Hubei,China Product description Product name ........................... : Self-powered Wireless doorbell Model and/or type reference : G2 Serial Model： N/A Standards ............................. : FCC Part15.231 01 Oct. 2015 Test procedure .............................. ANSI C63.10-2013 This device described above has been tested by NTEK, and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of NTEK, this document may be altered or revised by NTEK, personnel only, and shall be noted in the revision of the document. Date of Test ............................................ : Date (s) of performance of tests ............. : 14 Oct. 2015 ~16 Nov. 2015 Date of Issue ........................................... : 16 Nov. 2015 Test Result ............................................... : Pass Testing Engineer : (Eileen Liu) Technical Manager : (Brown Lu) Authorized Signatory : (Sam Chen) Page 3 of 26 Report No.: NTEK-2015NT1014899F ` Table of Contents Page 1 . SUMMARY OF TEST RESULTS 4 1.1 TEST FACILITY 5 1.2 MEASUREMENT UNCERTAINTY 5 2 . GENERAL INFORMATION 6 2.1 GENERAL DESCRIPTION OF EUT 6 2.2 DESCRIPTION OF TEST MODES 7 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 8 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 9 2.5 EQUIPMENTS LIST FOR ALL TEST ITEMS 10 3 . ANTENNA REQUIREMENT 11 3.1 STANDARD REQUIREMENT 11 3.2 EUT ANTENNA 11 3.3 CONDUCTED EMISSION MEASUREMENT 12 3.3.1 POWER LINE CONDUCTED EMISSION LIMITS 12 3.3.2 TEST PROCEDURE 13 3.3.3 DEVIATION FROM TEST STANDARD 13 3.3.4 TEST SETUP 13 3.2.5 TEST RESULT 14 3.4 RADIATED EMISSION MEASUREMENT 15 3.4.1 RADIATED EMISSION LIMITS 15 3.4.2 TEST PROCEDURE 16 3.4.3 DEVIATION FROM TEST STANDARD 16 3.4.4 TEST SETUP 17 3.4.5 TEST RESULTS (BELOW 30MHZ) 19 3.4.6 TEST RESULTS (BETWEEN 30 – 5000 MHZ) 20 4 . BANDWIDTH TEST 23 4.1 TEST PROCEDURE 23 4.2 DEVIATION FROM STANDARD 23 4.3 TEST SETUP 23 4.4 TEST RESULTS 24 5 . TRANSMITTER TIMEOUT 25 5.1 REQUIREMENTS 25 6 . EUT TEST PHOTO 26 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Page 4 of 26 Report No.: NTEK-2015NT1014899F ` 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15, Subpart C (15.231) Standard Section Test Item Judgment Remark 15.207 Conducted Emission N/A 15.203 Antenna Requirement Pass 15.231 Radiated Spurious Emission Pass 15.231 Occupied Bandwidth Pass 15.231 Transmitter Timeout Pass NOTE: (1) ” N/A” denotes test is not applicable in this Test Report. Page 5 of 26 Report No.: NTEK-2015NT1014899F ` 1.1 TEST FACILITY NTEK Testing Technology Co., Ltd Add. : 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street, Bao’an District, Shenzhen P.R. China. FCC Registration No.:238937; IC Registration No.:9270A-1 CNAS Registration No.:L5516 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U，where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±1.38dB 2 RF power,conducted ±0.16dB 3 Spurious emissions,conducted ±0.21dB 4 All emissions,radiated(<1G) ±4.68dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% Page 6 of 26 Report No.: NTEK-2015NT1014899F ` 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Equipment Self-powered Wireless doorbell Trade Name Linbell Model Name G2 Serial Model N/A Model Difference N/A Product Description The EUT is a Sel f-powered Wireless doorbell Operation Frequency: 433.92MHz Modulation Type: ASK Number Of Channel 1CH. Antenna Designation: monopole antenna Based on the application, features, or specification exhibited in User's Manual, the EUT is considered as an ITE/Computing Device. More details of EUT technical specification, please refer to the User's Manual. Channel List Refer to below Adapter N/A Battery N/A Note: 1. For a more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. 2. Channel Frequency (MHz) 01 433.92 -- -- Page 7 of 26 Report No.: NTEK-2015NT1014899F ` 2.2 DESCRIPTION OF TEST MODES To investigate the maximum EMI emission characteristics generates from EUT, the test system was pre-scanning tested base on the consideration of following EUT operation mode or test configuration mode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively. Pretest Mode Description Mode 1 TX For Conducted Emission Final Test Mode Description Mode 1 TX For Radiated Emission Final Test Mode Description Mode 1 TX Note: (1) The EUT use new battery. Page 8 of 26 Report No.: NTEK-2015NT1014899F ` 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED E-1 EUT Page 9 of 26 Report No.: NTEK-2015…

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Page 26 of 26 Report No.: NTEK-2015NT1014899F ` 6. EUT TEST PHOTO Radiated Measurement Photos