Includes a FREE power adapter, an 18-foot cable and a patch cable! The MXR Super Comp takes the original Dyna Comp (a legend with guitarists worldwide) even further. The MXR Super Comp provides an invisible boost to intricate licks, juicing up your sound, and helping you "lock in" like never before. Output and Sensitivity knobs let you dial in the perfect setting to keep your parts where they belong in the mix. The new Attack level control ensures that initial bite and chunk are never squashed so you can run the hottest pickups ands still hear your dynamics - yeah! Create the tight, percussive guitar sound that drives thousands of pop & country hits or add endless, tone-sweetening sustain to your leads. MXR M132 Super Compressor Controls Footswitch toggles Effect On/Bypass Output knob sets compressed (attenuated) output level Attack Level knob sets the attack attenuation level (highest attack level is minimum attack attenuation) Sensitivity knob sets the compression ratio (highest sensitivity is maximum compression)