2AK8Q-TKSD001RSpeaker Doorbell

Shenzhen Unichain Technology Co., Ltd 2023-09-05 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: 2AK8Q-TKSD001R Shenzhen Unichain Technology Co., Ltd 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. Sincerely, Applicant signature: Applicant printed name: Zhiying Lan Shenzhen Unichain Technology Co., Ltd 2023-09-05 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: 2AK8Q-TKSD001R Shenzhen Unichain Technology Co., Ltd 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: Zhiying Lan

Shenzhen Unichain Technology Co., Ltd 2023.09.05 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 BCTC Testing 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 : Zhiying Lan / Manager Contact information / address: 201, 111-3, Huangjinshan District, Bantian Community, Bantian Street, Longgang District, Shenzhen, China

Shenzhen Unichain Technology Co., Ltd 2023.09.05 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Speaker Doorbell Trademark: TECKNET/TeckNet MODEL: TK-SD001, TK-WD007 FCC ID: 2AK8Q-TKSD001R 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 : Zhiying Lan / Manager Contact information / address: 201, 111-3, Huangjinshan District, Bantian Community, Bantian Street, Longgang District, Shenzhen, China

Shenzhen Unichain Technology Co., Ltd Model Difference 2023/09/05 EUT NAME: Speaker Doorbell Trademark: TECKNET/TeckNet MODEL: TK-SD001, TK-WD007 All the model are the same circuit and RF module, except model names and color. Regards Sincerely Client’s signature: Client’s name / title : Zhiying Lan / Manager Contact information / address: 201, 111-3, Huangjinshan District, Bantian Community, Bantian Street, Longgang District, Shenzhen, China

External Photos

Label Location

Internal Photos BT Antenna 433M Antenna Receive only

FCC ID: 2AK8Q-TKSD001R 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. 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 GFSK2.480 -9.05 0.12-9±1-8.000.16<50.049923.00YES π/ 4 DQPSK 2.480 -6.97 0.20-6±1-5.000.32<50.099603.00YES 8DPSK2.480-6.770.21-6±1-5.000.32<50.099603.00YES Conclusion: For the max result : 0.09960＜3, the SAR testing is not required.

广东柔乐电器有限公司文件编码： RL-RD-WI-101 1 Antenna Specification Manufacture：GUANGDONG ROULE ELECTRONICS CO.,LTD Product Name：RL-BT01 Antenna Antenna Type：PCB Test Date：2023.09.07 Tested by：Fenji Xu Approved by：Jinfeng Wang Antenna Test Report 广东柔乐电器有限公司文件编码： RL-RD-WI-101 2 Content 1.General Description..................................................................................3 2.Test Configurations...................................................................................4 2.1 Test Environment.............................................................................4 2.2 Test Equipment................................................................................ 4 2.3 Test Principle................................................................................... 4 3.Test Results............................................................................................... 5 3.1 Gain and Efficiency.........................................................................5 3.2 Radiation Pattern............................................................................. 6 4.Antenna Dimensions.................................................................................9 5.EUT Photo.............................................................................................. 10 6.Test Setup Photo..................................................................................... 11 广东柔乐电器有限公司文件编码： RL-RD-WI-101 3 1.General Description ManufacturerGUANGDONG ROULE ELECTRONICS CO.,LTD. Address No. 12,Pingdong 3rd Road, Nanping Industry Community, Zhuhai City,GuangDong, China Test Location Rolelaboratory Product NameRL-BT01 Antenna Product model RL-BT01 Antenna Type PCB Antenna Test Items Gain; Efficiency; Radiation Pattern Test Frequency 2400-2500MHz Test Standard ANSI/IEEE Std 149-1979 广东柔乐电器有限公司文件编码： RL-RD-WI-101 4 2.Test Configurations 2.1 Test Environment Temperature ( °C )25 Humidity (%RH)60 Atmospheric Pressure (kPa)100.5 2.2 Test Equipment Test SystemTEM 24 Multi-probe Microwave Chamber Test InstrumentAgilent E5071B 2.3 Test Principle 广东柔乐电器有限公司文件编码： RL-RD-WI-101 5 3.Test Results 3.1 Gain and Efficiency Frequency (MHz)Peak Gain (dBi)Efficiency (%) 2400 0.4644.36 2410 0.7145.71 2420 0.9245.92 2430 0.9145.6 2440 0.9545.6 2450 0.9345.29 2460 1.2746.45 2470 1.3746.88 2480 1.2547.21 2490 1.2446.67 2500 1.0544.87 广东柔乐电器有限公司文件编码： RL-RD-WI-101 6 3.2 Radiation Pattern Phi 0 广东柔乐电器有限公司文件编码： RL-RD-WI-101 7 Phi 90 广东柔乐电器有限公司文件编码： RL-RD-WI-101 8 Theta 90 广东柔乐电器有限公司文件编码： RL-RD-WI-101 9 4.Antenna Dimensions 广东柔乐电器有限公司文件编码： RL-RD-WI-101 10 5.EUT Photo 广东柔乐电器有限公司文件编码： RL-RD-WI-101 11 6.Test Setup Photo

No.：BCTC/RF-EMC-007 Page: 1 of 80 Edition：B.0 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2308080055E Applicant: Shenzhen Unichain Technology Co., Ltd Product Name: Speaker Doorbell Model/Type Reference: TK-SD001 Tested Date: 2023-08-17 to 2023-08-29 Issued Date: 2023-08-30 Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 2 of 80 Edition：B.0 FCC ID: 2AK8Q-TKSD001R The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Speaker Doorbell Trademark: TECKNET/TeckNet Model/Type Reference: TK-SD001 TK-WD007 Prepared For: Shenzhen Unichain Technology Co., Ltd Address: 201, 111-3, Huangjinshan District, Bantian Community, Bantian Street, Longgang District, Shenzhen, China Manufacturer: Shenzhen Unichain Technology Co., Ltd Address: 201, 111-3, Huangjinshan District, Bantian Community, Bantian Street, Longgang District, Shenzhen, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2023-08-17 Sample tested Date: 2023-08-17 to 2023-08-29 Issue Date: 2023-08-30 Report No.: BCTC2308080055E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 3 of 80 Edition：B.0 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT operating Conditions ................................................................................... 13 6.5 Test Result .......................................................................................................... 14 7. Radiated emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 20 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 24 8.1 Block Diagram Of Test Setup .............................................................................. 24 8.2 Limit .................................................................................................................... 24 8.3 Test procedure .................................................................................................... 25 8.4 EUT operating Conditions ................................................................................... 25 8.5 Test Result .......................................................................................................... 26 9. Spurious RF Conducted Emissions ..................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test procedure .................................................................................................... 27 9.4 Test Result ...................................…

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Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 66 of 80 Edition：B.0 CFS NVNT 3-DH1 2480MHz Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 67 of 80 Edition：B.0 13. Number Of Hopping Frequency 13.1 Block Diagram Of Test Setup 13.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. 13.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 100kHz. VBW = 300kHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section. 4. Set the spectrum analyzer: Start Frequency = 2.4GHz, Stop Frequency = 2.4835GHz. Sweep=auto; 13.4 Test Result Condition Mode Hopping Number Limit Verdict NVNT 1-DH1 79 15 Pass NVNT 2-DH1 79 15 Pass NVNT 3-DH1 79 15 Pass Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 68 of 80 Edition：B.0 Test Graphs Hopping No. NVNT 1-DH1 2441MHz Hopping No. NVNT 2-DH1 2441MHz Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 69 of 80 Edition：B.0 Hopping No. NVNT 3-DH1 2441MHz Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 70 of 80 Edition：B.0 14. Dwell Time 14.1 Block Diagram Of Test Setup 14.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Frequency hopping systems may avoid or suppress transmissions on a particular hopping frequency provided that a minimum of 15 channels are used. 14.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set spectrum analyzer span = 0. Centred on a hopping channel; 3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting. 4. Use the marker-delta function to determine the dwell time. If this value varies with different modes of operation (e.g.. data rate. modulation format. etc.). repeat this test for each variation. The limit is specified in one of the subparagraphs of this Section. Submit this plot(s). 14.4 Test Result DH5 Packet permit maximum 1600 / 79 / 6 hops per second in each channel (5 time slots RX, 1 time slot TX). DH3 Packet permit maximum 1600 / 79 / 4 hops per second in each channel (3 time slots RX, 1 time slot TX). DH1 Packet permit maximum 1600 / 79 /2 hops per second in each channel (1 time slot RX, 1 time slot TX). So, the Dwell Time can be calculated as follows: DH5:1600/79/6*0.4*79*(MkrDelta)/1000 DH3:1600/79/4*0.4*79*(MkrDelta)/1000 DH1:1600/79/2*0.4*79*(MkrDelta)/1000 Remark: Mkr Delta is once pulse time. Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 71 of 80 Edition：B.0 Modulation Channel Data Packet pulse time(ms) Dwell Time(s) Limits(s) GFSK Middle 1DH1 0.412 0.132 0.4 1DH3 1.669 0.267 0.4 1DH5 2.916 0.311 0.4 π/ 4 DQPSK Middle 2DH1 0.422 0.135 0.4 2DH3 1.674 0.268 0.4 2DH5 2.922 0.312 0.4 8DPSK Middle 3DH1 0.424 0.136 0.4 3DH3 1.674 0.268 0.4 3DH5 2.925 0.312 0.4 Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 72 of 80 Edition：B.0 Dwell NVNT 1-DH3 2441MHz One Burst Dwell NVNT 1-DH5 2441MHz One Burst Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 73 of 80 Edition：B.0 Dwell NVNT 2-DH1 2441MHz One Burst Dwell NVNT 2-DH3 2441MHz One Burst Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 74 of 80 Edition：B.0 Dwell NVNT 2-DH5 2441MHz One Burst Dwell NVNT 3-DH1 2441MHz One Burst Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 75 of 80 Edition：B.0 Dwell NVNT 3-DH3 2441MHz One Burst Dwell NVNT 3-DH5 2441MHz One Burst Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 76 of 80 Edition：B.0 15. Antenna Requirement 15.1 Limit 15.203 requirement: For intentional device, according to 15.203: an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. 15.2 Test Result The EUT antenna is PCB antenna, fulfill the requirement of this section. Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 77 of 80 Edition：B.0 16. EUT Photographs EUT Photo NOTE: Appendix-Photographs Of EUT Constructional Details Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 78 of 80 Edition：B.0 17. EUT Test Setup Photographs Conducted emissions Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 79 of 80 Edition：B.0 Radiated Measurement Photos Report No.: BCTC2308080055E No.：BCTC/RF-EMC-007 Page: 80 of 80 Edition：B.0 STATEMENT 1. The equipment lists are traceable to the national reference standards. 2. The test report can not be partially copied unless prior written approval is issued from our lab. 3. The test report is invalid without the "special seal for inspection and testing". 4. The test report is invalid without the signature of the approver. 5. The test process and test result is only related to the Unit Under Test. 6. Sample information is provided by the client and the laboratory is not responsible for its authenticity. 7. The quality system of our laboratory is in accordance with ISO/IEC17025. 8. If there is any objection to this test report, the client should inform issuing laboratory within 15 days from the date of receiving test report. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China TEL: 400-788-9558 P. C.: 518103 FAX: 0755-33229357 Website: http://www.chnbctc.com E-Mail: [email protected] ※※※※※ END ※※※※※

Conducted emissions Radiated Measurement Photos