2AIT9PA-443Smoke alarm

  ȭdȭ FCC Caution 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: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. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

SZ PGST Co., Ltd 2023.05.24 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: 2AIT9PA-443 SZ PGST 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: DU ZHIXIAN / Manager SZ PGST Co., Ltd 2023.05.24 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: 2AIT9PA-443 SZ PGST 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: DU ZHIXIAN / Manager

SZ PGST Co., Ltd 2023.05.24 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 : DU ZHIXIAN / Manager Contact information / address: No.9 Building, Huafu Industrial Park, Huachang Road, Longhua District, Shenzhen, Guangdong, China

SZ PGST Co., Ltd 2023.05.24 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Smoke alarm MODEL : PA-443 FCC ID: 2AIT9PA-443 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 The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may required to be submitted with this application be permanently withheld from public review. 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 : DU ZHIXIAN / Manager Contact information / address: No.9 Building, Huafu Industrial Park, Huachang Road, Longhua District, Shenzhen, Guangdong, China

External Photos

Size:10*5mm Label Location FCC ID: 2AIT9PA-443

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2AIT9PA-443 Applied procedures / limit According to FCC §15.247(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. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz * = Plane-wave equivalent power density MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna, R=0.2m TEST RESULTS Conclusion: For the max Power Density(S)(mW/ cm2) : 0.00685＜1, the SAR testing is not required. Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW/ cm2) Result 802.11b 13±1 14 25.12 1.37 (1.37dBi) 0.00685 1 Pass

1 Antenna Specification Manufacture：TUYA Product Name：CB3S Antenna Antenna Type：PCB Test Date：2021.04.16 Tested by：Jianwei Wang Approved by：Licco Antenna Test Report Global Intelligent Platform 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 ............................................................................................... 9 6.Test Setup Photo .................................................................................... 10 3 1.General Description Manufacturer Hangzhou Tuya Information Technology Co.,Ltd Address Room 701,Building 3,More Center,No.87 GuDun Road, Hangzhou, Zhejiang,China Test Location Room 106, Building 3, Letong Science Park, No. 500, Qiuyi Road, Binjiang District, Hangzhou Product Name CB3S Antenna Product model CB3S Antenna Type PCB Antenna Test Items Gain; Efficiency; Radiation Pattern Test Frequency 2400-2500MHz Test Standard ANSI/IEEE Std 149-1979 4 2.Test Configurations 2.1 Test Environment Temperature (°C) 25 Humidity (%RH) 60 Atmospheric Pressure (kPa) 100.5 2.2 Test Equipment Test System TEM 24 Multi-probe Microwave Chamber Test Instrument Agilent E5071B 2.3 Test Principle 5 3.Test Results 3.1 Gain and Efficiency Frequency (MHz) Peak Gain (dBi) Efficiency (%) 2400 0.46 44.36 2410 0.71 45.71 2420 0.92 45.92 2430 0.91 45.6 2440 0.95 45.6 2450 0.93 45.29 2460 1.27 46.45 2470 1.37 46.88 2480 1.25 47.21 2490 1.24 46.67 2500 1.05 44.87 6 3.2 Radiation Pattern Phi 0 7 Phi 90 8 Theta 90 9 4.Antenna Dimensions 5.EUT Photo 10 6.Test Setup Photo

No.：BCTC/RF-EMC-005 Page: 1 of 76 Edition：B.0 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2305885604E Applicant: SZ PGST Co., Ltd Product Name: Smoke alarm Model/Type reference: PA-443 Tested Date: 2023-05-17 to 2023-05-22 Issued Date: 2023-05-23 Report No.: BCTC2305885604E No.：BCTC/RF-EMC-005 Page: 2 of 76 Edition：B.0 FCC ID: 2AIT9PA-443 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: Smoke alarm Trademark: Model/Type reference: PA-443 Prepared For: SZ PGST Co., Ltd Address: No.9 Building, Huafu Industrial Park, Huachang Road, Longhua District, Shenzhen, Guangdong, China Manufacturer: SZ PGST Co., Ltd Address: No.9 Building, Huafu Industrial Park, Huachang Road, Longhua District, Shenzhen, Guangdong, 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: 2023-05-12 Sample tested Date: 2023-05-17 to 2023-05-22 Issue Date: 2023-05-23 Report No.: BCTC2305885604E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is WIFI-2.4GHz band radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2305885604E No.：BCTC/RF-EMC-005 Page: 3 of 76 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 ................................................... 11 5. Test Facility And Test Instrument Used ............................................................... 12 5.1 Test Facility ......................................................................................................... 12 5.2 Test Instrument Used .......................................................................................... 12 6. Conducted Emissions .......................................................................................... 14 6.1 Block Diagram Of Test Setup .............................................................................. 14 6.2 Limit .................................................................................................................... 14 6.3 Test procedure .................................................................................................... 14 6.4 EUT operating Conditions ................................................................................... 14 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 15 7.1 Block Diagram Of Test Setup .............................................................................. 15 7.2 Limit .................................................................................................................... 16 7.3 Test procedure .................................................................................................... 17 7.4 EUT Operating Conditions .................................................................................. 18 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test procedure .................................................................................................... 24 8.4 EUT Operating Conditions .................................................................................. 24 8.5 Test Result .......................................................................................................... 25 9. Power Spectral Density Test ............................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test procedure .................................................................................................... 27 9.4 EUT Operating Conditions .................................................................................. 27 9.5 Test Result ....................................…

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Radiated Measurement Photos