The YAMAHA EZ-EG (Easy EG) is an electric guitar-shaped instrument without strings, designed for beginners. Anyone can easily play chords by pressing the illuminated switches on the neck. The switches light up in accordance with the chord progression of the built-in songs, and playing with your right hand alone produces accompaniment and melody. It requires no string changes or tuning, features a built-in speaker, and can be battery-powered. I have confirmed the sound from all frets. The sound and rhythm work without any problems. The main unit shows some signs of use, but there is no significant damage, and both the battery and adapter are in good condition. There is no case or arm. The only included accessory is the adapter. The instruction manual can be downloaded from the YAMAHA website! Thank you.