1.New 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 performs as the center bridge for whole Tuya ZigBee devices,which is highly recommended than other for compatibility. 2.Extremely lower cost than first generation with real-time accurate perception of house temperature and humidity, with clear digital LCD display.Smart automation is functional with other smart devices as electric heater and humidifier for 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, 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 mode with facial expression can the indoor environment according to the temperature and humidity value, and care for the healthy growth of the baby to a extent with comfort indicator in Smart Life APP. 5.Extremely mini size featured, 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: -10~50C Humidity measurement range:0%-99%RH Working voltage:DC2.4V-3V Battery specification:CR2032 button cell Product size:60x16.7mm(ROUND)/16.7x60x60mm(SQUARE) Screen size:46.5mm(ROUND)/46.5x46.5mm(SQUARE) Colour:White Material:plastic Package Contents: 1 x Temperature And Humidity Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.