You are viewing a JF-07 Classic Flanger Pedal. Using a BBD simulation circuit makes this a very versatile pedal. It has 4 adjustable knobs, Regen,Delay Time, Width and Speed which allows the user to shape the desired sound. You can easily get a variety of sounds from a jet air plane to space effects to a short delay to wave-like chorus, and vibrato. Powered by a 9V Battery or 9V adapter. This is a very well electrically designed and mechanically rugged pedal, at a great price!!!