The Petree Pet Drinking Fountain makes water cleaner by four layers of depth filtration and 365° full purification. There is also anti-dry protection. It will be automatically powered off when water shortage. Water is at the top and the bowl mouth is inclined, which is easy to drink. Totally waterproof and safe. The Petree Pet Drinking Fountain is a favorite of cats as the running water keeps them very interested and makes them drink more water than they typically would drink.