The Used Keeley 4 Knob Compressor pedal is a top-tier studio-grade compressor designed for guitarists who demand precision and tonal clarity. In great condition, this iconic pedal features four intuitive knobs: Sustain, Level, Tone, and Attack, allowing for precise control over your compression settings. Whether you're after subtle dynamic control or punchy squashed tones, the Keeley 4 Knob Compressor delivers consistently smooth, musical compression. It operates with true bypass for pristine signal integrity and runs on a standard 9V power supply. Renowned for its transparency and touch sensitivity, this pedal is a favorite among touring professionals and studio players alike.