The high-impedance FV-50H is designed to be connected before guitar effect units in the signal chain.The low-impedance FV-50L is a stereo volume pedal that can be used for a wide variety of purposes including keyboards.

Total control over your keyboards and effects units. The Boss FV-50L Low Impedance Volume Pedal is designed to make controlling the volume of your stereo instruments easy. Compatible with a huge range of instruments including keyboards, effects units, and more, it’s responsive, compact, and easy to use. Plus, with extra features including a tuner out jack for quick and simple tuning, it’s superbly functional, too. And there’s a volume knob that lets you set your ideal minimum volume for your performance. Take the hassle out of altering your volume on-stage.