Easy InstallationSlide the sleeve from the head towards the grip, then push the sight upwards from the bottom. Adjust horizontally until the light forms a 90-degree angle with the club head Improve Swing FeelHelps players master the correct swing feel and quickly correct their swing path, enabling proper ball-striking technique Dual Mode OperationFeatures "INT" (10-second beam) and "CON" (continuous light) modes, powered by 3 LR44 button batteries for versatile practice sessions Lightweight and PortableCompact design allows easy attachment to any golf club without adding noticeable weight, making it ideal for on-course use Versatile Practice ToolCompatible with all golf clubs and suitable for both left and right-handed players, enhancing swing accuracy and feel during daily practice Specifications: Material: ABS plastic Dimensions: Approx. 12.7 x 5 x 1.5 cm / 5 x 2 x 0.6 inches Weight: Approx. 40g Power Source: 3 x LR44 button batteries (included) Package included: 1 x Golf Laser Aiming Device (with Battery)