Cool Pup Dog Crate Fan New and improved Cool Pup crate fans keep pets cool, calm, and comfortable no matter how hot it gets. These Cool Pup Crate Fans provide a refreshing airflow for pets wherever they travel, or while at home. Retractable grip allows the fan to be hung on a cage, crate or pet carrier Fans circulate the air, removing warm air from the cage interior, and can help to protect pet from overheating Quiet, two-speed operation will not disturb pets Includes a built-in thermometer to measure ambient temperature Features a port to accommodate an AC/DC adapter (not included) The standard Crate Fan features a built-in thermometer to measure ambient temperature, and a port to accommodate an AC/DC adapter (not included). The standard Crate Fan comes in Silver. An optional Cooling Cartridge features a freezer pack insert and snaps onto the front of either model fan to add extra cooling power for up to two hours. Additional replacement freezer pack Refills are also available and sold separately. A 6-Volt AC Adapter allows the fan to be plugged into an electrical outlet. Size: Measures 6" L x 2" D x 8" H Powered by four "C" batteries (not included) Warranty: Manufacturer's Two Year Warranty