Starting sluggers perfect their swings with the SKLZ Lightning Strike Pitching Machine. Lightweight and portable, this pitching machine helps hitters gain confidence and develop reliable swing mechanics. The included sponge balls are slightly smaller than standard baseballs, helping to develop hitting accuracy and improve hand-eye coordination. Great for players making the move from T-ball to kids" baseball, the Lightning Strike throws fast balls, curve balls and height adjusts for different pitch locations, grounders and fly balls. The unit accepts 12 8-inch Lightning Strike balls at a a time. Set includes 6 balls and runs on batteries or electricity (plug it in with the included AC adapter).