2AU7E-T301Temperature & Humidity Smart Sensor

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Reference No.: WTX20X11091668W-1 Page 2 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 2 - EUT EXTERNAL PHOTOGRAPHS EUT View 1 EUT View 2 Reference No.: WTX20X11091668W-1 Page 3 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EUT View 3 EUT View 4 Reference No.: WTX20X11091668W-1 Page 4 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EUT View 5 EUT View 6

Reference No.: WTX20X11091668W-1 Page 1 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format FCC ID: 2AU7E-T301 Specifications: The label shall be securely affixed to a permanently attached part of the device, in a location where it is visible or easily accessible to the user, and shall not be readily detachable. The label shall be sufficiently durable to remain fully legible and intact on the device in all normal conditions of use throughout the device’s expected lifetime. Proposed Label Location on EUT FCC ID Label Location

Reference No.: WTX20X11091668W-1 Page 5 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 3 - EUT INTERNAL PHOTOGRAPHS EUT Housing and Board View 1 EUT Housing and Board View 2 Reference No.: WTX20X11091668W-1 Page 6 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Solder Board-Componen t View 1 Reference No.: WTX20X11091668W-1 Page 7 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Solder Board-Componen t View 2 Antenna View

1. MAXIMUM PERMISSIBLE EXPOSURE (MPE) 1.1 General Information Client Information Applicant: ShenZhen SigmaWit Technology Co.,Ltd Address of applicant: 11th floor,Lingyun Building, DingXin Industrial Area, Honglang North 2nd Road, Bao’an, ShenZhen,Guangdong Province,China Manufacturer: ShenZhen SigmaWit Technology Co.,Ltd Address of manufacturer: 11th floor,Lingyun Building, DingXin Industrial Area, Honglang North 2nd Road, Bao’an, ShenZhen,Guangdong Province,China General Description of EUT: Product Name: Temperature & Humidity Smart Sensor Trade Name / Model No.: T301 Adding Model(s): / Rated Voltage: DC 3V*2 Power Adapter: / Software Version: V3.1.5 Hardware Version: T301 V2.0 FCC ID: 2AU7E-T301 Equipment Type: Mobile Technical Characteristics of EUT: Bluetooth Bluetooth Version: V5.0 (BLE mode) Frequency Range: 2402-2480MHz RF Output Power: 2.71dBm (Conducted) Data Rate: 1Mbps Modulation: GFSK Quantity of Channels: 40 Channel Separation: 2MHz Type of Antenna: PCB Antenna Antenna Gain: 0dBi 1.2 Standard Applicable According to §1.1307(b)(1) and KDB 447498 D01 General RF Exposure Guidance v06, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. (a) 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 Times | 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 1500-100000 / / 5 6 (b) 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 Times | 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 1500-100000 / / 1 30 Note: f = frequency in MHz: * = Plane-wave equivalents power density 1.3 MPE Calculation Method S = (30*P*G) / (377*R 2 ) S = power density (in appropriate units, e.g., mw/cm 2 ) P = power input to the antenna (in appropriate units, e.g., mw) G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor is normally numeric gain. R = distance to the center of radiation of the antenna (in appropriate units, e.g., cm) 1.4 MPE Calculation Result For Bluetooth Maximum Tune-Up output power: 3(dBm) Maximum peak output power at antenna input terminal: 2.00 (mW) Prediction distance: >20(cm) Prediction frequency: 2480 (MHz) Antenna gain: 2 (dBi) Directional gain (numeric gain): 1.00 The worst case is power density at prediction frequency at 20cm: 0.0004 (mw/cm 2 ) MPE limit for general population exposure at prediction frequency: 1 (mw/cm 2 ) Result: Pass

Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Page 1 of 38 TEST REPORT Reference No. .................... : WTX20X11091668W-1 FCC ID ................................ : 2AU7E-T301 Applicant ........................... : ShenZhen SigmaWit Technology Co.,Ltd Address.............................. : 11th floor,Lingyun Building, DingXin Industrial Area, Honglang North 2nd Road, Bao’an, ShenZhen,Guangdong Province,China Product Name ................... : Temperature & Humidity Smart Sensor Test Model. ........................ : T301 Standards .......................... : FCC Part 15.247 Date of Receipt sample .... : Nov.30, 2020 Date of Test........................ : Nov.30, 2020 to Dec.15, 2020 Date of Issue ..................... : Dec.16, 2020 Test Result ......................... : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Tested by: Reviewed By: Approved & Authorized By: Jack Huang / Project Engineer Lion Cai / RF Manager Silin Chen / Manager Reference No.: WTX20X11091668W-1 Page 2 of 38 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn TABLE OF CONTENTS 1. GENERAL INFORMATION ...................................................................................................................................4 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ...............................................................................4 1.2 TEST STANDARDS ...................................................................................................................................................5 1.3 TEST METHODOLOGY .............................................................................................................................................5 1.4 TEST FACILITY .......................................................................................................................................................5 1.5 EUT SETUP AND TEST MODE .................................................................................................................................6 1.6 MEASUREMENT UNCERTAINTY ..............................................................................................................................7 1.7 TEST EQUIPMENT LIST AND DETAILS .....................................................................................................................7 2. SUMMARY OF TEST RESULTS ...........................................................................................................................9 3. ANTENNA REQUIREMENT ................................................................................................................................ 10 3.1 STANDARD APPLICABLE ....................................................................................................................................... 10 3.2 EVALUATION INFORMATION................................................................................................................................. 10 4. POWER SPECTRAL DENSITY ........................................................................................................................... 11 4.1 STANDARD APPLICABLE ....................................................................................................................................... 11 4.2 TEST SETUP BLOCK DIAGRAM ............................................................................................................................. 11 4.3 TEST PROCEDURE ................................................................................................................................................. 11 4.4 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 11 5. DTS BANDWIDTH ................................................................................................................................................. 12 5.1 STANDARD APPLICABLE ....................................................................................................................................... 12 5.2 TEST SETUP BLOCK DIAGRAM ............................................................................................................................. 12 5.3 TEST PROCEDURE ................................................................................................................................................. 12 5.4 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 12 6. RF OUTPUT POWER ............................................................................................................................................ 13 6.1 STANDARD APPLICABLE ....................................................................................................................................... 13 6.2 TEST SETUP BLOCK DIAGRAM ............................................................................................................................. 13 6.3 TEST PROCEDURE ................................................................................................................................................. 13 6.4 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 13 7. FIELD STRENGTH OF SPURIOUS EMISSIONS .................................................…

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Reference No.: WTX20X11091668W-1 Page 8 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 4 - TEST SETUP PHOTOGRAPHS Radiation Emission Test Setup (Below 30MHz) Radiation Emission Test Setup (30MHz to 1GHz) Reference No.: WTX20X11091668W-1 Page 9 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Radiation Emission Test Setup (1GHz to 18GHz) Radiation Emission Test Setup (Above 18GHz) Reference No.: WTX20X11091668W-1 Page 10 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn ***** END OF REPORT *****