"With its high-impedance design, the pedal is interesting for guitarists who want to control the volume of their guitar (and thus also the distortion of the amp) by pedal. The FV 500 fulfils this task - in contrast to most guitar potentiometers - practically without sound loss - particularly before the preamp of the amp! The tuner out is also very practical; With a connected tuner you can tune silently!" -Boss

This pedal is used in great shape. It works great. Stereo swells are in. Mono is out. 2025. Buy it now.