Fender Compugilist, Effect Pedal for Electric Guitar, 2 Pedals in one: Compressor and Distortion, Both switchable, Simplified control, Controller Distortion Tone, Gain and Level, Controller Compressor: Recovery, Comp and Level, 6.3 mm Jack input, 6.3 mm Jack output, True bypass, Power adapter connection: Coaxial connection 5.5 x 2.1 mm, negative polarity inside, Powered by a 9V battery or a 9V DC power adapter (not included), Suitable optional power supply: Art.#409939#