PLUSH SQUEAKY DOG TOY THAT WIGGLES, VIBRATES, & BARKS –Entice your dog to run, chase, play, and exercise. This interactive dog toy encourages fun playtime for large and small dogs of all life stages of life. REDUCE ANXIETY AND BOREDOM – With funny sounds, erratic movements, and a tail that crinkles, this plush dog toy will capture your dog’s interest and keep them mentally and physically stimulated for extended periods. EASY TO ACTIVATE – On/Off button on this plush dog toy is located on the top of the plastic ball. Press the button to turn the ball on. To activate, shake, roll, or throw Hyper Pet Doggie Tail. The random motion will continue for approximately 10 seconds. Once action stop, rock, roll, or throw the interactive dog toy again to reactivate and continue play. When playtime is over, simply press the button to turn the ball off. NEW COVERS AVAILABLE – Get other Doggie Tail covers to keep things fresh for you and your pet — search model 49980EA. BATTERY OPERATED PROLONGED PLAY – To install batteries, remove the plastic ball from Velcro cover. Using a standard (size 2) Philips Head screwdriver, loosen both screws to open the ball. Remove battery compartment, loosen the screw to open, and insert 3 AAA batteries. This interactive dog toy is designed to auto stop after a period without use – this maximizes battery life. (Batteries not included)