The Electro-Harmonix Double Muff Fuzz Nano is a smaller version of the Electro-Harmonix Double Muff, offering two different fuzz circuits with a switch between Double and Single modes. Single mode offers a more subtle, traditional fuzz tone while Double mode kicks things up another notch by deploying both fuzz circuits at once. Each circuit is individually adjustable to find the exact right helping of EHX fuzz tone for your needs.