This octave pedal is similar to a Boss OC-2, with that same filtered square wave voice, although I would say it is less subby, emphasising the growl rather than the boom! It has two modes, one with the standard Oct 1 and Oct 2 controls, the second mode swaps the Oct 2 for a drive, which is a thick, gritty fuzz, great for synthy sounds, and it can be used without the sub octave, too.
While at first glance it looks like an OC-3, it doesn't have the poly mode, I think because this pedal is analogue rather than digital.
It shows some signs of use, but is in decent nick over all.