State of Assembly: -to-GoWork Temp: -10~50 Celsiuswireless protocol: Zigbee 3.01. Radio transmission circuit and coding technology to solve signal interference blocking problem2. Various temperature modes can be adjusted for different scenes3. Wireless transmission of data signals, remote monitoring of mobile phones4. Ultra low power consumption and long battery life5. With low voltage monitoring prompt function6. send online reports to the 7. Demolition in of professional security8. Split , high reliabilityPower: DC3V AAA*2 Battery(not include) colour:whiteMaterial:plasticsize:61.2X23mmPackage Contents:1*Temperature and humidity sensor(With built-in battery)1*manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.