1. This is a great guitar accessory that can not hurt your when you learn guitar quickly. 2. The world's fastest guitar teaching aids, with five most common playing modes. 3. Eliminate the fear and depression of learning guitar, learn the right posture, how to hold the paddle, and proper paddle skills. 4. The guitar learning aid is designed with stable structure, universal fit, suitable for guitar types. 5. Practical guitar learning system teaching aid, features and portable, easy to carry and use. Colour:Black Material:Plastic Package Contents: 1 * Guitar chord trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.