This is not a simple "Piano Keyboard", because it supports 128 musical instruments, including Piano, Dulcimer, Accordion, Harmonica, Guitar, Bass, Violin, Trumpet, Sax, Flute, Banjo, Tinkle Bell, etc. Features: 128 different musical instruments. 3 keyboard layouts: 21 Keys, 36 Keys and 72 Keys. Black keys on/off.