It is a multi-timbral analog synthesizer with 2 mono synthesizer channels (one for melody, one for bass, although they can be used for anything really), 1 polyphonic synthesizer (4 voices), a 606-like drum channel, and two channels dedicated to cv/gate out (although all 8 channels can have cv/gate out). The unit is connected to a MIDI-IF box which allows you to unlock all of the CMU's functions via MIDI (Melody on channel 1, Bass on 2, 3-6 each of the poly voices, 7 and 8 separate dedicated CV/gate, 9 poly chain mode of channels 3-6, and 10 for the drums). There are many MIDI CCs per voice that the unit responds to, like LFO speed/depth/shape. As you can see on the back, there are 8 channels of CV/gate out so each of those MIDI channels sends cv/gate as well. This makes it a very powerful synth as well as MIDI-to-CV/Gate converter. The ports on the MIDI IF box are MIDI in and a DIN SYNC out, which allows you to sync another DIN device to incoming MIDI clock. It includes the power cables, MIDI box, connector cable and synth itself.