Whoah... this is a nice thermostat! Looking to upgrade your heating & cooling system before winter sets in? The Prestige™ HD thermostat provides control of 24Vac of heating and cooling systems. RedLINK™ enabled to work with compatible wireless accessories. The Prestige™ HD Thermostat Kit includes Portable Comfort Control, Wireless Outdoor Sensor and Prestige™ HD Thermostat. Oh, and did we mention, it just looks awesome! Come on over to ComfortGurus.com and learn more about these slick thermostats!