The Petmate® Deluxe Fresh Flow® Pet Fountain is a purifying pet water fountain designed to keep your pet cool and hydrated, especially during the warmer months. Pet parents and pets appreciate the patented slope design that provides a natural continuous flow of circulating filtered, oxygenated water to ensure that your dog or cat stays hydrated with a unique patented no splash water slide. Continuous running water attracts your pet and encourages them to drink more water. Holds a large amount of water and is ideal for multiple cat or dog households. The quietly running fountain plugs into a standard household AC outlet. Automatically release more water when needed. Replaceable charcoal filter (change filter every 30 days to ensure freshness). Holds 1.48L of water.