Product Features: Pet Fountain - features adjustable water circulation flow. Adjustable Splashguard Island eliminates water noise. Water bottle is equivalent to six bowls of water circulating down into the drinking bowl area. Uses any 2-liter soda bottle (Not included) or our Pet Fountain Water Bottle (Sold separately). Convenient for busy, on-the-go pet owners. Includes one replaceable charcoal filter. UL listed power adapter included (12V 500mA). Pet Fountain offers One-year warranty.