GVT - General Vintage Tone “ Brown box MKII “ Professional Overdrive/Distortion Analog pedal FX. This FX is Hand Made with select passive components by GVT at garage made ! Analog ???? x ???? . The sounds is classic type ODS mix and England classic sounds . This unit “ the classic version GVT with Led diodes . Works in 9-12-16-18 Volts with external power supply only . Controls : Hand Hand ( Drive section ) Tones ( Control about high range ) Accent ( mix contour mids / treblee ) Vol. ( Master output stage ) Dual switch : Kompressor ( with carbon resistors Allen Bradley and more glassy sounds / Mucho Gordo “ Hard driven “ full driven range for high gain tones ! All true bypass . Hand made by Diaz General Vintage Tone