Features 1、The product is suitable for right‑handed or left‑handed golfers, high performance. 2、Can be easily connected to the end of any golf putter grip, wide compatibility. 3、A plane red laser is given during golf swings, which is convenient for checking your swinging posture. 4、Correct the swing in time, improve the swing action, and improve the quality of each swing. 5、Simple to install and operate, just need to press the power button to check the swing. Item Type: Golf Swing Corrector Material: Aluminum Alloy Color: As Picture Shown Size: Approx. 7.8x2cm/3.1x0.8in Weight: Approx. 37.0g/1.3oz Battery: 3Pcs Button Alkaline Batteries (not included) Battery Model: A76 Voltage 1.5V How to use: 1. Put the laser on the handle and swing, you can see that the laser emits a red line and then check whether the direction of the red line is correct. 2. If the red laser beam is facing backwards, it means that the swing posture is too high. The red beam is facing forward, indicating that the swinging posture is too low. If the laser beam is facing the golf ball, the swing posture is correct at this time Package List 1 x Golf Swing Corrector