The PetSafe Laser Tail Cat Toy is a hands-free, auto-shutoff toy that creates a variety of fun play patterns. The toy features a Class IIIa laser with a 5mW max power output for a safe play experience. The laser tail automatically turns off after 10 minutes to prevent your cat from being over-stimulated and to keep the thrill of the chase fresh. For best performance, use only alkaline batteries.