The Venstar Remote Indoor Temperature Sensor with Override measures indoor air temperature from 32 F to 99 F at a location separate from the thermostat. Additionally, the remote sensor has an 'OVERRIDE' button which will place the thermostat into the override mode for up to four hours (see note below). The remote sensor will work with Venstar T1800, T1900, T2700, T2900, T2900SCH and T2300FS thermostat; each sold separately. It should be connected to the thermostat using solid conductor cat. 5 or cat. 6 type network communication cable, and can be used for applications where the sensor may be up to 250 feet away from the thermostat. This device will sense room temperature where it is installed, providing a temperature reading and show a blinking degree icon next to the temperature display on a compatible thermostat. Sensor Locations # Correct Locations: The Remote Sensor should be mounted approximately five feet from the floor, close to or in a frequently used room, preferably on an inside partitioning wall or on a section of wall without pipes or ductwork. Mount the sensor where temperature operating limits are within 32 to 99 F and the humidity operating range is within 0 to 95% relative humidity, non-condensing. # Incorrect Locations The Remote Sensor should NOT be mounted close to a window, on an outside wall, or next to a door leading to the outside. Do not mount the sensor in a location where it would be exposed to direct light and heat from a lamp, the sun, a fireplace, or any other temperature-radiating object which may cause a false reading. Finally, do not mount the sensor close to or in direct airflow from supply registers or return air grilles and in areas with poor air circulation (such as behind a door or in an alcove).