T-Rex Engineering MOLLER-2 Classic Overdrive Guitar Effects Pedal with Clean Boost; Allows for the Perfect Balance Between Overdrive and a Clean Signal (10034) Classic bluesy overdrive 0-20 db Independent clean boost for your solo Mix control which lets you dial in the perfect balance between distorted and clean signals The boost function lets you dial in a solo level, whether the overdrive circuit is activated or not Provides a wealth of dynamic tones