The Carl Martin Classic Flange is a versatile modulation pedal designed for guitarists seeking a unique flanger effect. Featuring controls for Speed, Depth, Pre-delay, and Feedback, along with a foot-switchable dual speed mode, this pedal offers a range of flanging sounds. It is built with a durable diecast housing and chicken-head knobs, and it can be powered by a 9V battery or a regulated 9V power supply.