20 to 30 VAC, 0.02 to 1 A Heating/Cooling, 0.02 to 0.5 A Fan, 5.44 Sq Inch Display, Square, Battery/Hardwired Power, Auto/Manual, 7/5-1-1/5-2 Day Programmable, 3-Heat/2-Cool Heat Pump, 2-Heat/2-Cool Conventional, Thermostat