Automatically turns your electrical equipment on or off according to the outside temperature. Plugs into any 120V receptacle or extension cord used in unheated areas. Provides 2 controlled receptacles. For auto, home, and farm; engine heaters, RVs, heat tapes, heat lamps, pump houses, livestock water tanks, boats, water pipes, etc. Save money by using power only when temperatures require it Maximum rating: 1800W/15A/120V. UL listed.