No more frozen bottles! This heated bottle keeps drinking water ice-free, even in sub-zero temperatures. Large 32-ounce capacity attaches easily to most small animal hutches, homes and cages. Thermostatically controlled for efficient operation. Easy-fill top makes refilling a snap. 20 Watts 120 Volts, 60 Hz. LOCKNDRY compatible. 12-15″ cord with anti-chew protector.