Feature 1、It detects the current temperature and humidity around environment. Fahrenheit (℉) and Celsius (℃) measuring units are switchable. 2、You can remotely view temperature and humidity via smart phone APP - for Tuya Smart or for Smart Life. Supports multiple connection modes - WiFi, BT, hotspot. 3、You can choose 1 min or 120min to update the temperature humidity via the APP. The more frequent the update, the faster the battery will drain. 4、If the current temperature and humidity exceeds the set temperature and humidity, the sensor will automatically alarm and the APP will push the message. 5、Supports voice control, it supports intelligent linkage by using APP to create scene. Specifications: Input Voltage: 3 * DC1.5V LR03 (NOT included) Quiescent Current: ≤30uA Low Power Undervoltage: ≤3.3V WiFi: 802.11b/g/n, 2.4GHz Working Temperature: -10℃~55℃ Working Humidity: 10%~90%RH Material: ABS Size: 7.5*7.5*4.5cm Weight: 85g Package List 1 * Temperature Humidity Sensor Note Powered by 3*LR03 batteries (NOT included). The battery life depends on the time interval as you choose.