Fulltone Fulldrive 3 Overdrive / Boost Pedal Real NOS JRC4558D chip Fulltone-exclusive Order switch which places the Boost either before or after the Overdrive section Toggle between two selectable modes: "90's" original FD2 voicing and "Wide Asym" Completely independent, discrete JFET Clean Boost with Volume control and Germanium Diode "limiting" function