This wire-less remote sensor is designed for digital hygrometer thermometer, easy to connect and use. After connecting, the sensor can monitor the environmental condition of a particular location, and then transmit the data to the connected digital hygrometer thermometer.
Features: 
Suitable for digital hygrometer thermometer. Easy to connect and use. 
The sensor can monitor the environmental condition of a particular location, and then transmit the data to the connected digital hygrometer thermometer.
Up to 60M/200FT transmission distance in open area.
Stable signal and high accuracy.  
Equipped with a hanging hole for easy placement. It can be hung on the wall or tree, or place in a baby's room, bedroom, warehouse or greenhouse.
Easy to operate. Powered by 2 * AAA batterys(not included).
Specifications:
Color: White
Water-resistant Level: IPX4
Powered By: 2 * AAA Batterys (Not Included)
Item Size: 105 * 55 * 35mm / 4.13 * 2.17 * 1.38in
Package Size: 110 * 65 * 35mm / 4.33 * 2.56 * 1.38in
Package Weight: 61g / 2.15ounce
Package List:
1 * Remote Sensor