The patented ProVelocityTM Bat is a professional batting trainer used by hitting coaches and high level athletes to increase bat speed, exit velocity and launch angle.To make contact with a live ball ball batters must achieve their preselected Bat Speed prior to impact.Audible feedback helps batters get on plane earlier for more time in the strike zone and an increased Angle of Attack.Athletes can train with or without a ball, off the tee, in the batting cages, or on the field.