Simply put, a Boost pedal allows you to toggle your volume with the tap of your foot. Need to boost into a solo, just tap... and when you're done, tap back out. Our SBO-20 Booster pedal gives you 4 adjustment knobs to help shape the tone of your boost from transparent to modded. Gain up to 20 db of clean boost, or, adjust the Bass, Treble, and Gain knobs to color and shape your tone to your liking.