It is specifically designed for beginners in guitar, with simple operation and easy pressing. It can be used with a tuning clip to make learning how to play guitar easier. Fixed key blocks help accurately find the correct chord. The side of the button is printed with chord letters, making it more intuitive and easier to remember during performance. Made with polymer soft materials to protect the strings, featuring precise design and accurate pressing, reducing noise. Suitable for guitars ranging from 47 to 53.8 inches. The distance between chords achieves optimal performance within 4.5 millimeters. Compatible with both acoustic and electric guitars. Enables playing F and G chords with one finger. This is the latest upgraded version, suitable for playing approximately 90% of songs. Ideal for music enthusiasts. Color: Black Material: Plastic Package Contents: 1 * Guitar Learning Aid Tool Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowance is +/- 1-3 cm.