Keep your home at the optimal temperature with the Nest Bluetooth Temperature Sensor. The Nest Temperature Sensor allows you to control the temperature of a specific room depending on the time of day. Likewise, you can put sensors in different rooms and choose which room to highlight when. It communicates room temperature to compatible Nest thermostats. Similarly, the temperature sensor is compatible with the Nest Thermostat E. or Nest Learning Thermostat. It works up to 50 feet away from your Nest Thermostat, though the range depends on the construction of your home. The range may also vary depending on wireless interference and other factors. Simply place it on a shelf or wall, set it up via the app and leave it to do its work.