The Barber Tone Press is a premiere compression solution. With its unique Parallel compression a Barber innovation that takes care of dealing with attack, ratio and release knobs of other so-called "studio compressors". Barber developed a one-of-a-kind proprietary continuous “blend control” circuit, and combined it with a discrete “Class A” FET mixer circuit to allow you to blend the natural signal of your guitar with a “phase-corrected” classic compression circuit. This simple 3-knob pedal provides unaltered attack, clean sustain and resonance. This pedal is in excellent condition and comes with a box.