Features: 2.5L capacity provides enough drinking water for pet. Bio-carbon filters kill bacteria, eliminate contamination to keep water clean. Fresh running water is funny and encourage pet to drink more. No noise design with 12V low output, ensure you and pet's safety. Suitable for all-sized dogs, cats to use. Adjustable water-flow speed, auto to feed pets water when you're on work, travel and out. Power by AC adapter, convenient to use.