1. Easy to Install: Push the sleeve from the head to the direction of the grip, and push the sight from the bottom and upwards. 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 swing path, supporting improved batting technique. 3. Power Supply: The sight is powered by 3 LR44 button batteries. In "mode", it lasts only 10 seconds. In "CON" mode, it continuously emits light until the voltage drops and the light dims. 4. Compact and Portable: The sight is small and lightweight, easily fitting on any golf club without adding noticeable weight. 5. Suitable for Practice: Compatible with all golf clubs, suitable for both left-handed and right-handed golfers to practice daily swings, improve technical accuracy, and enhance swing feel. Material: Plastic + Metal Color: Black Package Contents: 1 x Golf Swing Sight Note: Light and display differences may cause slight color variations between the image and actual item. Measurement error allowance is +/- 1-3 cm.