This durable aluminum de-icer is coated in teflon and has a low profile to avoid taking up space in your birdbath. Its large surface area is designed to run more efficiently while still putting out the same amount of heat as other conventional de-icers. The channels within the base promote water flow as the water is heated which also helps reduce mineral buildup. The BDT250 is safe to use in plastic bird baths and comes with a 10-foot cord with anti-rub protector. This product is made in the USA! cULus Listed. 250 watts, 120 volts, 60 Hz. It has a one year warranty from the manufacturer. Assembled in the USA.