Features 1. Golf training aid designed based on fundamental golf swing principles to help players develop proper swing mechanics and correct common issues such as the hook, enabling improved shot accuracy. 2. The sleeve installs from the clubhead toward the grip. The laser unit attaches at the base and slides upward into position. Once installed, adjust the sight left or right until the laser beam is perpendicular (90 degrees) to the clubhead for accurate alignment. 3. Powered by 3 x LR44 button cell batteries. Offers two modes: "INT" (Intermittent) mode emits a 10-second pulse to conserve power; "CON" (Continuous) mode emits a constant beam until battery power is low. 4. Universally compatible with most golf clubs. Compact and lightweight design ensures easy portability. Attaches securely to your club without adding noticeable weight. Specification Material: ABS Color: Black Size: 5 x 2 inch Weight: 100 g Package Includes 1 x Golf Training Aid