Main Features:   1. Tuya Smart ZB Temperature and Humidity Sensor: A Tuya ZB Wireless Gateway Hub is a must to work with the temperature and humidity sensor,as well as a variety of ZB smart products, which is proved to be the bridge and control center for smart homes and plays an irreplaceable role for ZigBee products and realizes the whole intelligent linkage of your house.Simply add the sensor into the ZB hub after adding the hub into Smart Life/Tuya App. 2. Real-time perception of temperature and humidity changes and real-time report to your smart phones with Smart Life Tuya App supported.History record and notice in App for smart controls for your house temperature and humidity.Monitor your house temperature and humidity no matter where you are.  3. New ZB technology with low power consumption microprocessor for long standby. Designed with low voltage monitoring reminder function in App for real-time power supply for your sensor.Battery powered with long battery life.(Battery not included in the package.)   4. New added with temperature compensation technique with smart scene linkage to your air conditioning and humidifier,offering your house with the most comfortable temperature and humidity to enjoy our smart life.LCD screen display even clearly shows its value for all family members.   5. Widely used in various places and easily stick it to the wall with the sticker for simple installation,or just place the sensor anywhere you like with the support bracket in the package;includes full 2-year warranty and 60-day refund guarantee for complete satisfaction.     Parameter:  Wireless Technology: ZB;  Working Voltage: 3V;  Transmission Frequency: 2.4GHz;  Working Temperature: ‒10℃ to ~55°C, 0% ~99.9%RH;  Undervoltage Alarm: Supported;  Dimensions: φ61.2mmx23mm;     Package included:  1 x Sensor;  1 x User Manual