【Auto-Rolling & 【LED Chaser】- Just press the button, our cat toy ball will automatically move randomly and turn on red light to attract your cat's attention. It can also automatically change direction when colliding with obstacles such as wall, chair, door, etc. 【2020 Upgraded USB Rechargeable】- Built-in 250mAh Li-ion battery can Last 4 hours after 1.5 hour charge. Can automatically shut off after 30 minutes, keeps your cat from losing interest in the toy ball, and perfect for those who don't have time with their cats and dogs. 【Durable & 【Safe】- Made of high-impact ABS plastic, wear-resistant and non-toxic, won't even break the wall, durable and safe for your pets. CE, ROHS, FCC certified 【More Exercise for Health】- Running around the LED Cat Chaser helps indoor cats and dogs exercise more, improve immunity, reduce obesity and kill boredom when the owner is not there 【Warning & 【Contact Us】- Please use this cat toy ball on hard floors, such as wooden floors, tile floors, thin carpets, might not roll well on thick carpets. Contact Us: Any problem, please feel free to contact us for help！