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 its responsive compact and easy to use. Plus with extra features including a tuner out jack for quick and simple tuning its superbly functional too. And theres a volume knob that lets you set your ideal minimum volume for your performance. Take the hassle out of altering your volume on-stage.