The AccraSpeed Trainer is a unique measurement device that reacts according to centrifugal forces. Simply strap it on your wrist and it will let you know how much arm speed you are generating. The AccraSpeed trainer is great for measuring overall arm speed or for comparing your arm speed on different movement pitches. For example it will tell you if your change up arm speed is the same as your fastball arm speed. Additionally, the AccraSpeed Trainer is ideal for location drills at game speed. It gives you instant feedback regarding whether or not you threw at your game speed.
Additionally, the AccraSpeed Trainer can be used for hitting feedback. It will sense the rotational speed of your hands as they travel in an arc during the swing. It will sense you maximum hand speed.....then just use it for instant feedback in drills or live hitting.