Designed for beginners, the play aid introduces the concepts of "universal chord" and "series", so that novices can play songs quickly and smoothly by self-study.Instead of pressing the strings with the left hand, reduce finger pain.Remember the color means to remember the strings, it is no longer difficult to remember.Improved chord conversion efficiency and smoother playing.Train your fingertips to exert force vertically and cultivate the correct hand shape.Contains 6 basic sequential chords and 10 expanded chords.Specification:Material: ABS + PCSize: 8 * 5 * 4cm/3.15*1.96*1.57inWeight: About 60gApplicable crowd: beginnersApplicable instrument: Folk GuitarTip:1. When you want to change the product, please remove it and re-clamp it. Don't be lazy, push it around, and infer the back feet of the booster, causing man-made damage. It is also not conducive to the maintenance of the piano.2. Suitable for 36-41 inch folk guitar. The fret fingerboard size of the first product should be 43-45mm.Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-3cm measuring deviation due to manual measurement. 1 x Guitar Chord TrainerChinese and English teaching, easy to understand, easy to learn and use. 61 exquisite black and white keys.