How many octaves does an accordion play?

The piano accordion is equipped with a right-hand keyboard similar to a piano or organ. Its acoustic mechanism is comparable to that of a piano, as they are both wind instruments. Unlike the piano keyboard, the keys are more rounded, smaller, and lighter to the touch. The keys go vertically down the side, pointing inward the bellows, making them accessible to only one hand while handling the accordion.

The bass piano accordion is a variance of a piano accordion without bass buttons and with the piano keyboard in an octave lower. The accordion typically has around three octaves. It requires more finger movement to operate.