The MXR M300 Reverb Pedal is a compact versatile FX pedal featuring 6 different reverb settings. The six reverb settings included in this FX pedal are hand-pick and meticulously crated by MXR to deliver rich high-end reverb styles. The Phase-90 sized box features a simple 3-knob design with each knob assigned to a different function. The M300 features decay and mix controls giving you maximum control over your sound.