A 3 gallon water with built in heated base that is thermostatically controlled to operate only when necessary. Keeps water from freezing down to 0 degrees. A 2 foot cord snaps into grooves at the base when heater is not in use. It has an easy fill plug in the bottom, so it is not necessary to take completely apart every time you fill it. Guaranteed for 1 year. Waters 25 adult birds.