How to use: 1: Press A for 2 seconds to open and another 2 seconds to shut down(no matter what modes the device is in). 2:Pree B for 2 seconds you can switch between Chord table mode and Circulation mode. 3:When it is in Chord table mode Area display of chord name and display of fingering chart in light area display of metronome and chords number in darkness. 4:When it is in circulation mode Area display of chord name and display of fingering chart all in light CHORD Table Mode 1. Press A for 2 seconds to open and another 2 seconds to shut down (no matter what modes the device is in). 2.Press B for 2 seconds you can sewitch between Chord table mode and Circulation mode. 3. When it is in Chord table mode Area 1 and 2 in light area 3 in darkness. 4. When it is in Circulation mode area 1 2 and 3 all in light. - GUITAR CHORD PRACTICE DEVICE: with a rotatable screen reserving the most commonly used chords inside can help guitar beginners/ students to develop muscle memory for chords and is a perfect tool for finger placement exercise. - GENUINE STEEL STRINGS： Equipped with genuine guitar steel strings help guitar players to build calluses and the tension of the strings can be adjusted with the tool included in the package. - PRACTICE WITH A METRONOME: There is a metronome inside the device so players can learn the chords with a customized tempo. It’s a quiet practice tool without guitar playing sound so you can’t tune or strum it like a real guitar. - PORTABLE POCKET GUITAR: A handy tool for guitar learners who still want to practice during trips instead of bringing the huge guitar when you are travelling you can carry this compact device to keep up your daily practice. Package included 1 x chord trainer