HEATED WATER BOTTLE 32OZ, High quality, durable PVC bottle keeps water from freezing in sub-zero temperatures. 20 watts of power - thermostatically controlled to operate only when necessary (below 35°F). Saves time and hassle - easily refilled from top; no need to remove bottle from cage. Perfect for rabbits, guinea pigs, birds and small rodents. Large 32 oz capacity. 14" power cord. Mounting springs included. For use with 120V grounded receptacle.