YAMAHA QX21 digital sequence recorder It shows some signs of use and has some noticeable scratches. Although it's old equipment, it still powers on, all buttons respond, and it produces sound. It comes with the instruction manual, but it's discolored and has some writing in it. If you don't need it, please let us know when you purchase. Also, we have only performed a basic operational check of the main unit. We have not checked all functions, such as external connections, so please be aware of this beforehand.