Up for auction is a boss dr-550 MK2 Dr rhythm this unit has been tested with the batteries and does power on. I have no other way to test this unit but with batteries please see photos to see Unit on. You're bidding on this unit as found in a recent storage unit purchase. Don't miss out on this amazing deal. We also offer fast and friendly shipping please review all photos before making a bid thank you PLEASE NOTE BATTRIES ARE NOT INCLUDED AND WERE ONLY USED FOR TESTING PURPOSES!