Vintage flange effect pedal that is designed for those guitarists who desire this unique form of modulation. It has four knobs to control Speed, Depth, Pre-delay and Feedback, plus a dual speed mode that is foot-switchable. As with all the Carl Martin Vintage pedals, it comes in a solid, die-cast housing with the cool CM graphics and chicken-head knobs. It can be powered by 9V battery or a (recommended) regulated 9V power supply like the CM ProPower.