This is the pet fountain with a three stage carbon filtration system that eliminates the impurities found in common tap water. Its integrated pump creates a constant stream of water into the basin. A mesh screen captures large particulates like pet hair while the fountain’s filtering system removes chemicals, metals, and other elements that produce unpleasant tastes and odors. Made from food-grade HDPE, the fountain has an optional smart mode that saves energy, prolongs filter life, and reduces noise. Filter lasts up to 12 weeks on smart mode and four weeks on normal mode. Holds two liters. Plugs into AC. 7" L x 7" W x 5 1/4" H. (2 1/2 lbs.)