The GSA PRO is a perfect training partner for all golfers of any skill level. You can use it on practice ranges, golf games, during lessons with coaches, or even at home. Weighing in at just one-third of an ounce, the GSA PRO is the world's lightest and most advanced golf swing analyzer. The GSA uses advance motion sensors technology to capture over 10,000 data points on each of your swings and provides immediate feedback.