Unlike ordinary harmonica, chromatic harmonica (chromonica) has a button that controls the sharps and flats (similar to the black/white keys of the piano).
To combine between the chromonica and the guitar, Hagai had build a holding facility that is connected to a specially built pedal. While playing the guitar hagai pushes with his foot the pedal. It enables Hagai to play the guitar and the charmonica togather.
fretless 12 strings Guitar
A cross between a guitar and Uod (an arabic guitar). I always loved the sound of the OUD ... Since the instrument with which I feel most "at home" is a guitar, I decided to combine the two instruments. I took classical guitar, added another six strings and made it fretless.