OOTDTY Features:100% brand new and high qualityThe is for those who have given up the guitar due to finger pain, string buzzing, or the need to develop finger callouses when fretting the strings directly. You should make every effort to play without it. When the is properly installed, and no buttons are pushed down, there will be no interference with the vibrating strings. The chord learning tool can help you do hand postures and practice hand muscle memory. Improve the efficiency of chord conversion and make playing more smoothly. Train your fingertips to exert strength vertically and cultivate the correct hand shape. The installation is simple and there is no complicated process. Suitable for guitar beginners and all people. Scope of application: Folk guitar (38 inches 41 inches)Specification:Materail:ABSSize:Approx.10.6x5.2x2.2cm/4.17x2.05x0.87inNet Weight:70gPackage Includes:1x Guitar Chord Trainernote:Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.