1. ZigBee smart temperature and humidity sensor is designed with Tuya ZigBee hub required for APP configuration and other smart controls in Tuya Smart APP,and the Tuya ZigBee gateway performs as the center bridge for whole Tuya ZigBee devices,which is highly recommended than other hubs for its compatibility. 2.Extremely lower cost than our first generation with real-time accurate perception of house temperature and humidity,together with clear digital LCD display.Smart automation is functional well with other smart devices as electric heater and humidifier for whole house linkage,even with effective period optional for more flexible controls. 3.Battery level is shown on the LCD display with accurate battery condition in APP meanwhile,together with low battery alarm and Temp. unit convert between ℃ / ℉ for easy reading to your own need.(Note:Two types optional as the round and square type) 4.The intelligent guardian mode with facial expression can improve the indoor environment according to the temperature and humidity value, and care for the healthy growth of the baby to a large extent with comfort indicator in Smart Life APP. 5.Extremely mini size featured,together with two placement methods as table place and wall-mounting mode for simple installation and usage. Product Name:ZigBee Temperature Humidity Sensor Wireless protocol:ZigBee Temperature measurement range: -10℃~50°C Humidity measurement range:0%-99%RH Working voltage:DC2.4V-3V Battery specification:CR2032 button cell Product size:φ60x16.7mm(ROUND)/16.7x60x60mm(SQUARE) Screen size:φ46.5mm(ROUND)/46.5x46.5mm(SQUARE) Colour:White Material:plastic Package Contents: 1 x Temperature And Humidity Sensor