Used Blammo Psychlops in excellent condition. This pedal is a dual circuit design: Copying a DOD 250 Overdrive and a Dan Armstrong Green Ringer. The DOD portion of this circuit provides a single opamp drive as the basses for the tone of this pedal. The Green Ringer portion is basically an octave up drive with focused ring modulation tendencies. All together this makes for a simple yet versitile octave up style overdrive. This used psychlops has no cosmetic wear to speak of and functions as it should. Original box included.