Roland PG-1000 linear synthesizer programmer for D-50 / D-550. Includes power supply and original owner's manual. Immaculate condition. Tested and works well. Display is like new. Bonus: Includes uninstalled unused Eprom Rom chip with firmware OS Version 3.0. By exchanging this eprom chip with the original roland chip you can upgrade your PG-1000 into a MIDI fader box capable of sending 127 MIDI continuous controller messages on any of its faders. This will allow you to control other synths in your collection and also computer based soft synths. No soldering needed. Just remove the IC 4 chip out of its socket and install this one in instead. Eprom original documentation will be emailed to the buyer upon request.