Automatic Thermostat, Automatically Turns On At 38 Degrees Fahrenheit, 3 Degrees Celsius, & Turns Off At 50 Degrees Fahrenheit, 10 Degrees Celsius, For Use With FreezeFree Heating Cables, Heat Lamps, Electric Heaters, & Engine Warmers, Has A Power Indicator Light, 1,800W Maximum, 15A, 120V, No Wiring Necessary Just Plug In.