DescriptionNote: Additional Information regarding Product and Installation can be found in the Resources section. The wireless remote outdoor sensor monitors temperature at a remote outdoor location and transmits the temperature data wirelessly to the thermostat. The sensor can be used to view the outdoor temperature or for heat pump systems requiring the use of balance points. One wireless outdoor remote sensor can be connected. Features Display outdoor temperature Use for heat pump balance point control 1 wireless remote outdoor sensor can be connected* Requires 2 "AA" Lithium batteries (included) Product Type: Outdoor Sensor Wireless: Yes