Thank you for viewing! This is a machine that allows you to safely practice batting indoors. It's safe because you practice with sponge balls. It's the perfect item for training dynamic vision so that children can properly meet balls coming straight at them when they are in elementary school. You can practice alone, and hitting small balls will likely increase your chances of success in a game! My children's strikeouts decreased, and their batting averages improved. Children who don't strike out will surely be in the starting lineup, I think. Please give it your best shot. A separately sold adapter is also included. From the manufacturer's website ↓ The launch trajectory is almost horizontal, with an amazing sense of speed! The launch distance is 4-7m! A 40mm diameter meet point ball is continuously launched at intervals of about 5 seconds. By practicing hitting balls smaller than actual balls, you can improve bat control and develop the dynamic vision that is essential for batters.