The Mad Professor Forest Green Compressor Sustainer Compressor/Sustainer will bring out the best in your tone. You will hear the subtleties in your own playing that you have not heard before, while adding a sweet violin like sustain to your lead playing. If country picking is your thing, the Forest Green will help you achieve that hot chicken-picking sound of all your favorite country players. Select from two different modes between Compressor and Sustainer. In Sustain mode, you can get a very dynamic, touch sensitive tone with a long sustain. Here the attack is not lost, making the pedal suit- able even for blues playand works great with slide playing. The LEVEL control adjusts the overall volume, which means this pedal can be employed as a booster. The COMPR. knob sets the amount of compression and sustain. These pedals are hand made in Finland using only premium components, to give years of trouble free operation with superb musical tone.