The Thermo Cube TC3 is a unique temperature-controlled, dual-receptacle electrical device. The device conveniently plugs into a standard 120-Volt outlet and is thermostatically controlled, turning on at 35°F and off at 45°F. The Thermo Cube is ideal for use in a variety of home and farm applications, including stock tank de-icers, pond de-icers, unheated rooms, pump houses, greenhouses, boats and RVs. Best of all, it saves money by using power only when the temperatures require.