The White Rodgers 1F73-174 digital non-programmable thermostat is perfect for upgrading multi-stage and heat pump systems to digital thermostats. It is simple to install and compatible with most heat pump and multi-stage systems. It features a large, 1.2 inch LCD display that also has improved contrast for easier reading. The White Rodgers 1F73-174 digital non-programmable thermostat has a 50 percent lower profile than popular competitive mechanical models. It has automatic changeover, electronic temperature accuracy and adjustable room temperature features. Change from heating to cooling effortlessly, maintain room temperature differential within 1 degree, and used the lighted display and keypad to change temperature settings. Permanent memory backup is also included on the 1F73-174 digital non-programmable thermostat in case there is a loss of power. For gas, oil or electric applications.