The Drain Plug De-icer is a great way to ensure you tank does not freeze over the winter. This De-icer is 1500 watts, 120 Volts and 60 hz. By mounting in the drain plug of tanks this de-icer is secure, safe for all livestock, Thermostatically controlled, Recommended for 100-300 Gallon tanks, Plug is designed to fit all drain holes 3/4" or larger. This tank De-icer also comes with a one year warranty provided by the manyfacturer.