Remote Sensor
If you have setup to use the wireless air sensor as a remote sensor, should the battery fail in the wireless air sensor, the neoStat will switch back automatically to its internal sensor reading. Once the wireless sensor battery has been replaced, the system will go back to using the temperature from the remote wireless sensor.
Averaging
If you have setup to use the wireless air sensor for temperature averaging between that and the neoStat, should the wireless air sensor battery fail, the neoStat will switch back automatically to its internal sensor reading. Once the wireless sensor battery has been replaced, the system will go back to using the average temperature.