Here is what Echopark has to say:
"Inspired by of one of the most iconic, transparent overdrives produced in 1977,
The Echopark 1977, gives you the best components of the “Grey Spec” DOD Overdrive, and 2 Diode clipping/switching mods all in one.
This pedal will create an “in your face” louder overdrive or the warm tones of the Germanium.
Great buffer for lead or bass guitars.
Looking down at the 1977. Left side knob is volume, right side knob is gain. Center 3 way toggles Left, silicon diode clipping, center knob is power down.
Made in America"