The most durable de-icer on the market. Thermostatically controlled to operate only when necessary. Element is encased in cast aluminum for durability, safety and efficiency. For use in ponds of 50 to 600 gallons. 1250 Watts. 10 ft. supply cord. Fish and plant friendly. Safe in all ponds. Designed to keep a small hole open to release harmful gases. Unique patented design. Three Year Manufacturer Warranty.