This is a state-of-the-art electric bird bath de-icer. It will keep your outdoor bird-bath from icing over and allow your friendly wild bird friends to have a drink. Features include: constructed of patented cast aluminum for ultimate efficiency and safety; thermostatically controlled to operate only when the temperature falls below 35 degrees F.; safe in plastic and concrete bird baths; has an 18" UL Listed power cord; cord has a 3-prong plug; easy to install-needs no clamps or brackets. Size: 3" x 7" x 1" thick.