The OCD pedal is the only pedal that uses 2 x Mosfets configured as hard clipping to Vref." The earliest OCDs used 2 x Mosfets plus 1 x Germanium diode, but very quickly these diodes became harder and harder to find, and they became expensive. Fulltone recently got their hands on a reasonably large stash of the right kind of Germanium diodes and decided to do a small run of the ultimate OCD: a Custom Shop offering with a few circuit tweaks, 2 x Mosfets plus 2 x Germanium diodes, and one hell of a beautiful paint job... Metallic Teal with a chrome undercoat! In terms of sound, the OCD-Ge has great definition, more tube-like feel, a bit wider dynamic range, more sustain, and a more focused single-note tone. And as with all Fulltone pedals, it is 100% Built in the USA. "¢ Germanium diodes. "¢ Audio (Log) taper volume pot. "¢ Internal selectable True Bypass or Enhanced Bypass. "¢ Fulltone 3PDT footswitch. "¢ Current draw: ±8 mA. "¢ Runs on any voltage between 9 and 18 Volts DC."