The WaterDog outdoor pet fountain lets your dog help itself to fresh water so you don't have to worry about stagnant or empty water bowls. Smart sonar sensing technology triggers the WaterDog to turn on a cool, clean stream of fresh drinking water when your pet comes within 3 feet (one meter), and turns off when your pet leaves. Enjoy peace of mind knowing your pet always has access to fresh drinking water. Connects quickly and easily to any outdoor faucet.