The Button Accordion is a type of free-reed musical instrument that uses buttons instead of piano keys to produce sound. It consists of a bellows, a set of reeds, and a series of buttons that are pressed to create different notes. This instrument is popular in various folk music traditions around the world, including styles from Ireland, Italy, and South America. Unlike the piano accordion, which has a keyboard layout, the button accordion typically features a diatonic or chromatic button arrangement. This design allows for a compact and lightweight instrument, making it easy to carry and play. The button accordion is often used in traditional music ensembles and can produce a rich, expressive sound.