Three Types for choice(Note) WIFI 2.4G / Zigbee 3.0 / Bluetooth Low Energy Three versions of the product are available: WiFi Version: support 2.4GHz WiFi signal, you can connect APP through WiFi signal; Zigbee Version: It needs to be used with Tuya Zigbee gateway and connect APP through Tuya Zigbee gateway; Bluetooth Version: It needs to be used with Tuya Bluetooth gateway and connect APP through Tuya Bluetooth gateway; Note ZIigbee version and Bluetooth version have stronger standby function and stability Tuya Smart Temperature Humidity Sensor Feature 1. Remote Control You can remotely view temperature humidity via smart phone using the app,tuyasmart or smart life. 2.Choose the time interval to update temperature or humidity. 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. 3. Temperature Unit Selection in APP You can choose or as the temperature unit through app. 4. Third-party Voice Control Works with amazon alexa, google assistant.You can check the current temperature and humidity by voice. 5.Battery Life Use AAA' 3pcs,battery are not included.The battery life depends on the time interval as you choose,usually,it can last for several months if we choose 120min to update.but the battery will last for only 2-5days if we choose 1min to update. 6.Time/Date Show time and date after connected with internet. 7. With backlight The backlight can be turned on when viewing at night; Tuya Smart Temperature Humidity Sensor Wireless Type:2.4GHz WiFi / Zigbee / Bluetooh Battery type: AAA*3PCS(not included in the package) Standby current: 26uA Wireless type: 2.4GHz WIFI /Zigbee/BLE Working temperature: -10 60 (14F140F) Working humidity: 0% 100% Temperature error: Typical error +-0.5C Relative humidity error: Typical error +-5% Size: 84mm x 80mm x 20mm