If you are here you'll probabily know what we are talking about. This is one little precious piece of equipment, a parametric equalizer in pedal form is definitely not that common these days, and definitely not at this price! Parametric equalizers let you sculpt your tone in a much more musical way than graphic equalizers, which boost or cut specific bands with a very narrow spectrum for each, so that your tone will be typically affected with strange noises. Try and you'll see/hear, especially in recordings. This parametric example, instead, lets you choose very precisely the one frequency you want to cut or boost, with a useful width little knob: this one lets you set how many frequencies around that one that you chose as the central one, you want to be boosted or cut, too