1. Easy to Install: Slide the sleeve from the clubhead toward the grip, then insert the sight from the bottom upward. Adjust the sight left or right until the light beam is at a 90-degree angle to the clubhead. 2. Improve Swing Accuracy: The alignment sight helps players develop proper swing path and direction, supporting consistent ball striking and improved technique. 3. Power Supply: The device uses 3 LR44 button batteries. In "pulse" mode, the light runs for 10 seconds. In "continuous" (CON) mode, it stays on until battery power diminishes and the light weakens. 4. Lightweight and Portable: Compact design makes it easy to carry and install on any golf club. Adds minimal weight, so it does not affect the clubs balance or feel. 5. Suitable for Practice: Compatible with all golf clubs and suitable for both left-handed and right-handed players. Ideal for daily swing practice to enhance alignment, swing path, and technical consistency. Material: Plastic + Metal Color: Black Package Contents: 1 x Golf Swing Alignment Sight Note: Light reflection and display settings may cause slight color variation between the product image and the actual item. Measurement may vary by +/- 1-3 cm. Our products are made with high-quality materials and designed for optimal performance. Orders are typically shipped within three business days. Estimated delivery time is 815 business days. Please review product dimensions and details in the title and description to ensure compatibility with your needs. We aim for complete customer satisfaction. If you have any questions, please we are happy to help. Thank you for choosing our product. We hope you enjoy using it.