1、It detects the current temperature and humidity around environment. Fahrenheit (℉) and Celsius (℃) measuring units are switchable. 2、You can remotely view temperature \u0026 humidity via smart phone APP - Tuya Smart or 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/humidity exceeds the set temperature/humidity, the sensor will automatically alarm and the APP will push the message. 5、Supports voice control. Compatible with Amazon alexa/ Home. Also, 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 1 * Temperature Humidity Sensor