The RS300N series Robertshaw thermostats represent a new level of sophistication and elegance in a compact package. These space saving Robertshaw Thermostats offer surprisingly advanced control capabilities. Use remote indoor sensors or monitor the outdoor air temperature. A set back button on this Robertshaw Thermostat provides for alternate temperature settings for occupied/unoccupied periods. LEDs are readily visible for quick verification of system status. The large LCD display on these Robertshaw Thermostats is easy to read, allowing for easy monitoring of time (optional on some models) and temperature.