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 consumption and long battery life5. With low voltage monitoring prompt function6. Timely send online reports to the 7. Demolition design in the field of security8. Split design, high reliability: DC3V AAA*2 Battery(not include) colour:whiteMaterial:plasticsize:61.2X23mmPackage Contents:1*Temperature and humidity sensor(With -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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.