Whats up Gang! All of you have access to a radar gun which is required, but I HIGHLY RECOMMEND getting a blast motion sensor. Will be able to get more data on your swing and can se in real time (with numbers) where you're at now and where we need to be at. (bat speed, attack angle, on plane efficiency) Numbers don't tell the whole story, but the goal inside this program is to become an elite hitter in game with the numbers to back it up! Being able to look at these numbers will show us an even better look where we can improve