“Roland PG-1000 Linear Synthesizer Programmer D50 /D550 with hardly any use time! This is the only external controller unit for the very popular and powerful D-50 and D-550 synthesizers. Offers complete control of all parameters in an easy to use traditional slider controller. This unit was respectfully stored in a recording studio but has almost no use time. Power supply is brand new but not original. Unit is in perfect working condition!” Click here to search for synths on eBay