MXR PedalFX "Dyna Comp" is a pedal that boosts your signal, adds spectacular sustain, or creates the percussive click sound heard in countless productions.

It runs on a 9-volt battery, a 9-volt Dunlop ECB003 power supply, or DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).

Connect your guitar to the INPUT jack on the Dyna Comp, and another cable from the OUTPUT jack on the Dyna Comp to your amplifier.

Start with all controls set to 12 o'clock.

Engage the effect by pressing the pedal.

Turn the OUTPUT knob clockwise to increase the overall volume of the effect or counterclockwise to decrease it.

Turn the SENSITIVITY knob clockwise to increase sensitivity (more compression) or counterclockwise to decrease it (less compression).

The inline compressor "levels" your signal, which is especially useful for greater sustain with stable dynamics.