The reaction ball aid is perfect for improving hand-eye coordination and reaction time. Get a better analysis of your players' reaction to the ball as you get instant feedback on reaction time. Improve speed and coordination The six-sided high-rebound rubber design makes the ball jump and jump randomly. Throw the ball between two players, or wear it against the wall. When landing, the ball will bounce in an unexpected way. Repeating these steps will improve your speed and coordination in Baseball Training for All Sports Reaction Ball is great for all sports! The ball works on hard surfaces, grass, grass, dirt walls, or team environment. Sharpen your deep perception while making training fun and effective.