Electro Faustus EF103 Guitar Disruptor.V.1 The EF103 Guitar Disruptor is a hybrid overdrive/octave/oscillation pedal. Sit back as your guitar signal is massaged and manipulated by copious amounts of digital mayhem. This unit can be powered by 9V battery or with standard Boss-style 9V regulated power supply (not included). Last one with EXP jack in stock.