Auto-Rolling & LED Chaser- Simply press the button,our 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 last3- 4 hours after 2-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, and non-toxic ABS plastic, won't break even hit the wall, durable and safe for your pets. Passed CE, ROHS, FCC certification^ 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 & Con_tact Us - Please use this cat toy ball on hard floors, such as wood floor, tile floor and thin carpet. But it might not roll well on thick carpet. Con_tact Us: Any problem, please feel free to con-tact us for help