BOSS FV-50H/FV-50L Volume PedalThe 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. High-impedance FV-50H designed for connection before guitar effects units Low-impedance FV-50L enables direct control of stereo keyboards and stereo effects units Minimum Volume knob lets users set minimum volume as desired Convenient Tuner Out jack enables speedy tuning on stage