Premier Series Digital Thermostat With Humidity Control, Switchable: Programmable Or Non-Programmable, Choose 7-Day, 52 Day Or 1-Day Programming, Up To 4 Heat 2 Cool Stage, Gas, Electric Or Heat Pump Control, Fault Input, Comfort Recovery, Control To, Or Monitor A 2Nd Temperature Sensor, Programmable Fan, Set Point Limiting, Bi-Color Led Indicates A Cooling Or Heating Demand, Power: 24Vac Return, Made In China