OverDubber 2 is a morphing / distorting delay unit.
It's designed to work with high gain and resonance levels with an internal limiter that will not allow the signal to go too loud. Useful on things like Dub, TripHop, DnB, also for EDM build ups when used with it's pitch shifter.
Basically, OverDubber 2 is a stereo delay but it has a filter, a big crusher, a pitch shifter and an automatic stereo pitch LFO in the feedback loop, quite an unusual combo. You can turn them all on, or off as desired.