Feature: 1. SMART ROLLING DESIGN: Automatic rolling ball features a smart rolling design that makes pets eager to chase and tease. 2. BUILT IN SOUND DEVICE: Smart rotating ball has a built in sound device to stimulate your pet"s interest and interaction. 3. ACTIVITY AND EXERCISE: Pet toy ball encourages activity and exercise for your pet, helping to keep them healthy and happy. 4. STURDY: Smart moving cat toy ball is made of plastic material to ensure long life and durability. 5. SMART INTERACTIVE CAT TOY: Interactive cat toys ball is an ideal pet toy for cats and dogs of different sizes and breeds. Specification: Item Type: Smart Rotating Ball Material: Plastic Battery: Li Battery (Shipped With Built In Battery) Capacity: 150mAh. Package List: 1 x Smart Rotating Ball 1 x Data Cable