The floating winter pond de-icer is for use in those colder locations where typical winter temperatures result in significant or long term icing of pond surfaces 120 watts of heating power Extremely energy efficient Thermostatic control to reduce heating time and save electricity Internal electronics epoxy sealed for watertight protection 18 grounded power cord Made from rugged, high impact ABS plastic 1-year limited warranty Will not harm flexible liners or pre-formed ponds