The Tankside De-Icer clamps to the side of any stock tank and prevents livestock from removing the unit from the tank. The De-Icer comes with an adjustable thermostat which allows the user to set the water temperature (raising the water temperature to encourage drinking, or lowering the water temperature to save electrical expense). The heating element has a large diameter for prolonged De-Icer life. The lower portion of the heating element will keep the drinker ice-free. Not for use in plastic tanks. The thermostats on these models are replaceable. 1500 watts, 120 volts.