Features: Automatic Direction Change:Due to the sphere shape and self balancing system, the ball will automatically change its direction when colliding with a wall, chair, door, etc. no extra help required, all you need to do is turn the ball on to play and turn off when your pet is out of energy and done playing. 360 Degree Self Rotation:The primary purpose of the self rotating ball is to have your pet chase the ball around and have fun. With just a single press of a button, the ball will start to do a 360 degrees self rotation and attract your pet& 39;s attention. Enticing Design: The surface of the cat ball is made of synthetic fiber. Its touch makes cats feel comfortable to play with. Automatic Obstacle Avoidance: Thanks to the built-in intelligent motion sensor, ball is able to reverse itself and move away when hitting an obstacle or tight spots. No need to worry about it getting stuck in the corner. After-sales Service:If you have any problem, please contact us immediately, we will help you solve it as soon as possible. Specification: Material:ABS+ silicone Diameter:4.3CM 1*ball