2 Lasers (GREEN and RED) and 3 Laser Systems (Alignment, Calibration, and Visualization) make Laser Putt the most accurate putting aid in golf today! Dimension - 6 x 5 x 3 in. Item Weight - 1 lbs. ALIGNMENT: The GREEN laser lets you visually confirm that you are lined up perfectly every time and allows you to see exactly where the putter makes contact with the ball. You will clearly see if you hit the ball off the toe or heel as well as the amount of your error. You can then make the corrective adjustment. and consistently strike the ball dead center.CALIBRATION:Whether you're lining up a 20-foot putt or a two-footer. the length of your backstroke always controls the distance you putt the ball. The longer the putt, the longer the stroke. The RED laser shows you the precise apex of your backstroke, letting you putt with repeatable consistency at any distance.VISUALIZATION:Laser Putt produces powerful visual images to store in your mind-images of your own putting-that can give you the bo