The sinking de-icer for tanks up to 300 gallons, operates at the bottom of the tank where it is less likely to be disturbed by livestock. The strong, durable, stainless steel heating element is thermostatically controlled for efficient operation. That thermostatic control coupled with thermal feedback protects the unit from overheating. The thermostat is positioned above the heating element to ensure safety in low-water conditions. It comes complete with a galvanized wire guard for use in plastic tanks. It has a 6-foot cord with durable anti-rub protector. LOCKNDRY compatible. 1500 Watts, 120 Volts, it is UL, CSA Listed.