This is a used Roland TMC-6. It was used to add extra inputs first to a TD-20 module then to a TD-30 module. It is not compatible with the TD-50 module so the customer traded it for a TD-17 module to achieve similar results. Its in decent shape with the original box, owners manual, mounting plate, and power supply. Its been checked and functions as it should.Comes with a 30 day warranty from Edrumcenter.