The Crossfire CMP-509 Vintage Compressor Pedal delivers a classic smooth sounding compression; great for increasing sustain and pushing your tone through the mix. Fully adjustable Attack, Sustain and Level controls allow you to dial in just the right amount of compression to tighten up your tone. It features a sturdy footswitch and control knobs, and can operate with either a standard 9v battery or centre negative power supply (Available separately). Housed in a rugged metal casing and built to last, this guitar pedal will certainly go the distance.