Air Guitar Pro Acoustic Guitar Size: 200x75x20mmItem Description:This is just the upper neck of an acoustic guitar, and the strings are the infrared ray that makes the sound as your fingers hit the fretboard. The controller has seven buttons on the front to click for "G" to "A" and four buttons on the side to identify the chords as major, minor, augmented or diminished. It also includes ten songs for air guitar beginners.  You’ll also be able to plug in an amp or headphone to enjoy the music beyond the built-in speakers. Works with two AAA batteries (not included). China supplier:Email : fangzhengcn@hotmail.com Skype ID : chanceller819