Heated water bottle prevents water from freezing in sub-zero temperatures. Thermostatically controlled to operate only when necessary. Flip top allows for easy refills - no need to remove bottle from the cage. Ideal for outdoor rabbits, especially during the colder winter months. Heavy-duty plastic bottle can easily be removed for filling and cleaning. Flip-top lid makes refilling a snap. 20 watts with 16-1/2" chewproof cord. Brass valve. Hanger included. 32 ounce capacity. UL-Listed components.