A great companion for the metal guitarist, the BOSS HM-2 guitar effect pedal allows you to put out the distortion effects that defined 80s heavy metal. You can easily adjust your distortion level on the BOSS Heavy Metal using the Dist knob. The Color Mix (L, H) tone controls on the BOSS HM-2 let you fine tune your sound as you like it. Finally, the Level knob on this guitar effects pedal controls the output boost. The BOSS Heavy Metal can also help you reproduce the classic sound of the 80s Marshall Amps. This sturdy guitar effects pedal is powered by standard ACA series adapters.