It has 64 rotary controls which can be programmed to much more than just send MIDI cc data.
One of its unique features is that each knob can be programmed (via an external Windows editor (Mac users use VMware or other)) to send sysex data thus a knob could be used to trigger sequence parameters or play chords.
Studio use only. In general good condition including carrying leatherette soft case, original manual and power supply.
I am pulled about parting with this unit but I need to scale down.
Manual: http://www.doepfer.de/pdf/drehbank_man_short.pdf