This new dog ball allows your dog to play even when you're not home. When your dog moves the ball it detects it and automatically moves in a randomized pattern. Our ball is filled with the best technology to improve reliability when you're not home. There are two ways to power your ball. You can charge it with the included charger or replace the 3 double A batteries. Now when you're not home your dog will still be able to play to its hearts content.