Material: The cat smart ball is made of safe silicone and ABS material, which is resistant to bite and also ensures the safety of the cat. When it gets dirty, just wipe it with a damp paper towel or remove the silicone case to clean it. Automatical Obstacle Avoidance Function: automatic obstacle avoidance system, Ball will reverse itself and move away when it hits an obstacle or tight spots, no need to worry about the cat toy ball being stuck in the corner or lost. Bionic design: simulating the escape trajectory of prey, the 43mm diameter fits the cat's claws, which stimulates the cat's hunting instinct. Bring more fun and help your cat do more indoor exercise. 2 ways to play: intelligent timing for 5 minutes, unlimited play, 1-button switching. 80mAh lithium battery, USB/Type C charging design is more convenient. Application: Designed for cats, kittens and puppies, not suitable for adult dogs. Specification: Material: ABS Silicone Size: 43mm in diameter Battery capacity: 80mAh Weight: 50g Size Chart: 43x43mm/1.69x1.69inch Package Includes: 1 Piece Cat Toys Balls 1 Piece USB/Type C Charging Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!