it's the MODSEQ
An 8HP eight step roto sequencer with a difference, it only has four knobs!
Essentially the MODSEQ is aimed at those times you need an extra sequencer for doing modulations, the effect is something akin to a sample and hold, but programable rather than random.
Of course adding a clock divider and patching up the reset alows you to use it as a standard four step sequencer. You can even drive the clock at audiorates and use it as a square wave oscillator.