Farm Innovators TC-3 Cold Weather Thermo Cube Thermostatically Controlled Outlet - On at 35-Degrees/Off at 45-Degrees Plugs into a standard 15 amp electrical outlet and turns power on automatically according to ambient air temperature. Works with any 120V electrical device Saves money by using power only when temperatures require heating Two receptacles for use with more than one electrical device Turns on as temperature falls to approximately 35F, off as temperature rises above 45F Ideal for home and farm applications such as pond de-icers, unheated rooms, pump houses, greenhouses, boats and RV's