In the words of ThorpyFX:

The Tacit Blue is part of our Vintage Reimagined series and is a germanium Fuzz pedal that plays nicely with your pedalboard. The Tacit Blue Fuzz sound is based on a highly modified fuzz face type circuit for a more versatile vintage style sound. This fuzz can give a subtle hair to notes or get crazily thick depending on your preference. However, this pedal can be used as a nice and thick lower gain overdrive which adds huge character to your driven sound.