The Catit Senses Fresh & Clear Drinking Fountain is a re-circulating system that offers your cat cool, fresh, filtered water. It features a multi-stage filtration with replacement carbon that absorbs water impurities and collects debris, hair and food. The drinking fountain helps encourage your pet to drink water for proper kidney function and avoid crystal formation that commonly leads to urinary disease. Includes a detachable AC adapter and 5' power cord. Holds 100 oz of water and measures 8 1/4"diameter x 6" tall. Ideal for cats and small dogs.