LUX Heating and Cooling Thermostat, 24 VAC, Mechanical Operation, 50 to 90 deg F Operating, Wall Mounting, For: 24 V Heat and A/C Systems, 1 Stage Heat or 1 Stage Cool - Gas, Oil or Electric Systems, 2-wire Heat Only Hydronic Systems (Hot Water Baseboard and Radiator), Single Stage Heat Pumps, Includes: Wallplate