Features: 1. The magic ball is made of high-quality material, durable, not easy to break, reusable and durable. 2. Reduce separation anxiety: The rolling ball is designed to keep your pet busy and reduce stress when you ignore them. It's perfect when you're at work, have important tasks, or just relaxing and enjoying a quiet moment. 3. Promotes strong mental health: It's not uncommon for our dogs to get bored, especially when they're home alone all day. Designed with interactive features to stimulate your pet's natural instincts to play, it's perfect for keeping our pet happy and energetic. 4. Built-in battery-powered motor: It rolls automatically from inside the motor. Just unscrew the ball, insert an AA battery, click the button on top and watch your pet play for hours on end. 5. Automatic movement and interaction: the sweeping plush ball rolls automatically. Its unique interactive features arouse your pet's curiosity and keep them engaged. 4 Machine washable covers included: Each ball includes 4 different machine washable covers. Please note: 1. Actual color may differ from the image due to different monitors and light effects. 2. Please allow 1-3 cm deviation due to manual measurement. Material: plush + reusable plastic Size: 13.5 * 13.5 * 13.5 cm Power supply: 1 AA battery (not included)