This is the putting trainer that helps you improve your ball striking, club path, and putt alignment. The system's infrared sensors detect both the speed and direction of each putt, providing precise, instant feedback by showing exactly where the midpoint of the ball has struck the bar in relation to its "virtual hole." A series of putts are displayed on the bar as separate illuminated tick marks. The flexible bar automatically bounces the ball back to you. The sensitive trigger bar can be set to any green speed and distances between four and 32'. The trainer challenges you with six games; you can play a game of "500" which requires you to place a series of five putts as close as possible to the hole. Putts are graded on a scale of 0-100. Can be played on any surface. Includes two C batteries. 5 1/2" H x 18 1/2" W x 8" D. (12 1/2 lbs.)