This water bowl was developed by a veterinarian with the help of an animal behaviorist. It continually circulates water, encouraging proper hydration by attracting pets to drink more, thereby reducing the risk of urinary tract infection and kidney disease. A pre-filter removes large particles, and a three-layer charcoal filter removes smaller impurities. The soft, adjustable flow won't startle cats or require constant splash mop-up, and it has the quietest pump available. The spout is elevated over 8" from the floor, providing easy access to either the waterfall or the bowl. A large reservoir makes the capacity of the fountain over one gallon, allowing for longer periods between refills, or supplying enough water for a multiple cat household. Easy to clean, the bowl and reservoir are dishwasher-safe, and the unit plugs into AC. 10 1/2" H x 11" W x 16" D. (3 1/2 lbs.