Description: Auto-Rolling & LED Chaser - Simply press the button,the cat toy ball will automatically move around randomly, and glowing out red light to get your kittys attention. It can also automatically change direction when colliding any obstacles such as wall,chair,door,etc. Upgraded USB Rechargeable - Built-in 250 mAh Li-ion battery, can last 4 hours after 1.5-hour charging. Can automatically shut off after 30 minutes, prevent your kitty from losing interest in the toy ball and perfect for those who dont have time with their cats and dogs. Durable & Safe - Made of high-impact, wear-resistant ABS plastic, won't 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, improve their immunity, reduce obesity and kill boredom when the owner isnt around Caution - Please use this cat toy ball on hard floors, such as wood floor, tile floor, thin carpet, might not roll well on thick carpet. Specification: Material: ABS Plastic Size(diameter): 6.4cm/2.5inch Package Includes: 1 Piece Cat Toy