Hot Scot, 450W, Well House Heater, Use Inside The Access Panels On Livestock Waterers Or Well Houses, Comes With Built In Adjustable Thermostat, Thermostat Range Is From 30 Degrees To 150 Degrees Fahrenheit, Operates On 120V, Only 4A Required, Has A 6" Long Cord, 110V Plug, Not For Use Under Plastic Or Plastic Case Fountains, Non-Submersible, Low Profile, Dimensions: 8-1/8" x 3" x 2-1/8".