This compact training tool uses a laser to guide your golf swing, designed for both indoor and outdoor practice, and it helps refine your alignment, grip, and stance so your practice translates into meaningful on-course improvements and more consistent results. Primary mode assists with body alignment and exact grip alignment. Mounting method: attaches to the top of the grip by adjusting the screws and securing the laser pointer. After mounting, establish or mark a target line to evaluate your swing plane; alignment sticks are more effective for this purpose. During practice, swing so the laser remains parallel to your target line throughout the entire motion, checking during the backswing, downswing, and follow-through. Regular use builds muscle memory, helping you translate training into on-course improvements with your clubs. Dimensions: 60 mm x 13.5 mm Weight: 29 g Batteries: 3 x LR44 Button Batteries (also known as AG13) Output power: