The Moonlight is the Greuter version of the legendary Fuzz Face. Since an original Fuzz Face is not always easy to use, we designed the moonlight to adapt better without loosing the vintage character and feel. The Moonlight works very well with your guitar volume pot. Set a fuzz sound you like and roll down the volume on your guitar and get wonderful clean sounds, dirty but dynamic overdrive or classic fuzz sounds from just your volume pot.