Multifunction Music Sequencer, Yamaha QY300 unit This sequencer is still very popular even after several decades since its release, due to its functions, sound source, and operability. This item has been confirmed to power on, all keys are functional, and composing can be done without problems. (Due to its many functions, I haven't tested all of them.) * Floppy disk drive operation has not been confirmed. Please consider this item as junk. The price has been reduced accordingly. (Returns are not accepted.) As this is a used item, there are signs of use, discoloration of the keys, and dirt. There may also be other minor scratches and dirt. Please consider this only if you understand these points. Please refrain from purchasing if you are concerned about minor details. Thank you for viewing.