Check out the demo video... Very good representation of the sounds you'll find with this Germanium version of the Screamer Fuzz.

Description from Cusack Music:
The Cusack Music Screamer Fuzz Germanium is a new take on our classic Screamer Fuzz. This limited production model features Germanium overdrive clipping and our original LED fuzz circuit design. (Both fuzz and overdrive are in the same circuit and are inter-dependant.) We've also made it compatible with higher voltage power supplies, added a tone circuit, and equipped it with some proprietary milled aluminum knobs. To top it off , we also added a light pipe LED with a nickel plated brass bezel, plus a Terridium finish. If you are looking for a unique overdrive/fuzz that has a variety of personalities and some added sonic quirks, you've come to the right place!    

CONTROLS
-Level sets the output volume.
-Drive adjusts the gain of the germanium overdrive section.
-Fuzz adjusts the amount of fuzz. 
-Tone is a simple and effective low-pass filter. Start with the knob at maximum and roll back to tame high frequencies. 

POWER
-Standard center negative 9V DC supply, or 9V battery (not included)
-Current draw: ~6mA

DIMENSIONS
-4.42" L x 2.39" W x 1.24" H