This item was previously sold on Mercari for around 6999 yen. 【Efficient Guitar Learning】 This guitar learning system attaches directly to the fret wires, allowing even beginners to easily learn scales and chords. 【Visual Support】 Numbered position markers show you at a glance which fret to press. This significantly improves the efficiency of your practice. 【Easy Installation】 It can be easily installed using the included rubber bands and is compatible with various guitars. - Learning System: Guitar learning system - Installation Method: Attaches to guitar fret wires - Accessories: Includes rubber bands - Numbers: Numbered 1 to 6 Thank you for viewing.