I've used this OC-5 a couple of times, but it's in great condition with minimal signs of use. Operation has been confirmed to be good. I'm selling it because I no longer need it. - Model: OC-5 - Brand: BOSS - Function: Octave Effect - Controls: DIRECT LEVEL, +1 OCT LEVEL, +2 OCT LEVEL, -2 OCT RANGE, POLY, VINTAGE, LOWEST - Input/Output Terminals: OUTPUT, DIRECT OUT, INPUT Thank you for looking.