The Aerolite Compressor is designed to bring you greatest compression effect together with retained infinite sustain of the original tone! The Aerolite Compressor is equipped with an Input switch suited for High, Middle, and Low Input adjustment. The Comp control to set the amount of compression and sustain while Attack adjusts the dynamic and touch-sensitive attack. Mix adjusts the original signals and compressed sound to gain the ideal tone with a superb compression and retained infinite sustain of the original tone. When adjusting Mix CCW to the minimum, the Aerolite Compressor can be used as a boost for guitars, basses and other musical instruments. True Bypass design minimizes tone loss.