Allied precision 10N, sinking de icer operates at the bottom of the tank where they are less likely to be disturbed by livestock. Thermostatic control coupled with thermal feedback protects the unit from overheating, while positioning the thermostat above the heating element ensures safety in low water conditions. Each unit comes complete with a galvanized wire guard for use in plastic tanks. 1000-watts, 120 volts. UL, CSA Listed