Rotary Knob has 5 postions

Position 1-Clean Bypass- Your natural guitar sound

Position 2- Clean Booster- Boosts the clean signal for increased output and volume

Postition 3- Blues Overdrive- Light Tube-Like Distortion

Position 4-Rock Distortion- Good for Rock and Classic Rock

Position 5 Metal Distortion- Balls to the Wall!

Simple to wire and install. This unit replaces one of your existing tone pots. No drilling or mods needed.

Comes with battery clip, stereo jack, and simple to follow wiring diagram