Features: 1. The magic ball is made of high-quality material, wear-resistant, not easy to break, reusable and durable. 2. Reduce Separation Anxiety: Rollerball is designed to keep your pet busy, reducing stress when you ignore them. Its perfect for when youre at work, have important tasks, or just relax and enjoy some quiet time. 3. Promotes strong mental health: Its not uncommon for our dogs to get bored, especially when theyre home alone all day. Designed with interactive features to stimulate your pets natural instincts to play, Its perfect for keeping our pet happy and energized. 4. Automatic movement and interaction: the sweeping plush ball will automatically roll Its unique interactive features spark your pets curiosity and keep them engaged. 4 Machine Washable Covers Included: Each ball includes 4 different machine washable covers. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect. 2.Please allow 1-3cm deviation due to manual measurement. Material: plush+reusable plastic. Size: 13.5*13.5*13.5cm. Power supply: AA battery (not included).