Positive is a low to high gain overdrive/distortion based on the 'vintage' hotcake circuit. GAIN controls the amount of distortion and ranges from a boost to almost fuzz territory. VOL acts as a master volume and the TONE switch changes between flat or mid scoop sound.
This pedal is true bypass and runs off the usual negative tip 9V DC adapter, requiring less than 25mA. On the current batch the LED is white. The color is a vintage cream with a hint of green. Think aged filing cabinet.