This 1000 watt pond de-icer is designed to float in the water tank or small pond. It is thermostatically controlled by the manufacturer with an automatic shut-off. The styrofoam float is completely enclosed within a rugged plastic housing. The cord exits from the top of the unit. This gives the heater added stability and it is less likely to tip the tank. 1000 watts, 120 volts with 6-foot cord for use in ponds.