The Joyo JF-MK is an overdrive pedal that will give you that recognizable vintage tube amp's overdrive guitar tone. The Joyo JF-MK Lion’s Roar Mike Kerr Signature Overdrive is also recognized as a dirt box that offers everything from a cleanish boost, to a medium amount of gain. It has the standard gain, volume, and tone knobs most drives have. However it also has a color knob which provides control over another portion of the mids frequency spectrum. This gives you a lot of tonal variety.The wild but spacious harmonics perfectly represent Mike Kerr's musical style. True bypass technology reduces the tone loss.