Whether you’re using it for fun, sport or fitness, the Power® Ball Neon Pro red is an enjoyable way of passing the time, improving your grip strength and getting fit. With a 250Hz rotor and 6 ultra-bright LED’s that flash red as the ball moves, you have to use the start cords to get the gyroscope moving. Then by using the momentum of your lower arms, you have to keep it going and see how fast you can get the gyroscopes to move. This Power® Ball is made out of plastic and rubber, and includes a 6-function LCD speed meter to track your progress. A full set of instructions is included with the Neon Pro Power® Ball, and it comes with a manufacturer’s lifetime guarantee. This Power® Ball includes batteries.