1. Easy to Install: Push the sleeve from the head to the direction of the grip, and push the sight from the bottom upward. Then adjust the sight left and right until the light is at a 90-degree angle to the clubhead. 2. Swing Guidance: The sight helps players develop proper swing alignment and correct hook paths, supporting improved batting technique. 3. Power Supply: The sight uses 3 LR44 button batteries. In "OFF" mode, it lasts only 10 seconds. In "CON" mode, it continuously emits light until the voltage drops and brightness decreases. 4. Compact and Portable: The sight has a small design and is easy to carry, fitting easily on any golf club. It is lightweight, so it does not add noticeable weight to the club. 5. Suitable for Practice: Compatible with all golf clubs, suitable for both left-handed and right-handed players to practice daily swings, improve technical accuracy, and enhance swing consistency. Material: Plastic + Metal Color: Black Package Contents: 1 x Golf Swing Sight Note: Light and screen display differences may cause slight variations in color between the image and actual item. Measurement error allowed is +/- 1-3 cm.