Button Accordion
A set of bellows with buttons on the right hand side arranged in 3 rows, playing in the keys of B, C and C . This allows the instrument to be fully chromatic. The notes on this side are different on the push and pull of the bellows. There are buttons on the left hand side, which provide bass notes and chords (as the piano accordion) -- and are the same on push or pull of the bellows. See also Accordion