Description Upgraded USB Rechargeable Cat Toy Ball: No need for battery replacement. This smart interactive cat ball toy has a built-in Li-ion battery, charge 1.5H can last 4 hours of fun. The USB rechargeable design is not only convenient but also environmentally friendly. Smart 360 Auto-Rolling LED Chasing Ball: 360 Degree self-rotating moving ball. The led motion ball rolls around and changes direction automatically and smartly when encountering obstacles. Just press the button, red light on and the ball will start. Durable Safe: Indoor cats ball made of high-impact, wear-resistant, and non-toxic ABS plastic. It is durable enough and wont break up even hit the wall. No small parts, safe for your cat or puppy to play and lick. Wont break even hit the wall, durable and safe for your pets. More Exercise for Health: Chasing around the cat LED chaser helps the indoor cats and dogs to get more exercise, The ball toy will attract your cats to be busy for catch and chase all day. Its a great way to help your cat get exercise, helps to keep cats physically fit and mentally active, elimination of boredom and pet depression. Tips: Please use this cat toy ball on hard floors, such as the wood floor, tile floor, and thin carpet. But it might not roll well on thick carpet. The primary purpose of this pet electronic toy is to stimulate hunting instincts and have fun.