Thank you for viewing. YAMAHA Yamaha QY70 Music Sequencer Operation confirmed. Power-on confirmed. No problems were found with the buttons, etc. Condition of the item: Some scratches and dirt. Please check the most noticeable scratch in photo 9. This item was given to me. I was told that there are no operational problems. I have also confirmed this. I do not know the details. AA batteries are not included. Please note that this is a used item stored by an amateur. We appreciate your understanding. All accessories are shown in the photos. Thank you.