Thermo Cube – Thermostatically controlled outlet turns the power on/off automatically according to outside temperature (on at 35ºF, off at 45ºF). For use with stock tank de-icers, heat tape, heat lamps and engine block heaters. Features two receptacles for use with more than one electrical device. Plugs into standard outlet and it's ready to go! Saves time, energy, money and equipment, by running only when necessary. 15 amp.