DigiTech DBM Bad Monkey Tube-Overdrive Analog Distortion Guitar Effects Pedal Bundle with Power Supply, Instrument Cable, Patch Cable, Picks, and Austin Bazaar Polishing Cloth Level boosts the output level of your guitar signal Low adjusts boost and cut of bass frequencies High adjusts boost and cut of upper harmonics Gain provides smooth tube amp distortion to your sound High adjusts boost and cut of high frequencies