Guyatone Distortion ps-001 This is an old distortion pedal from Guyatone. It produces a vintage, flavorful sound. Regarding the condition: The effect on lamp behaves a bit strangely. It flickers on and off rapidly. The effect sound itself is not affected. Also, when using batteries, it flickers constantly. (I haven't tested it with new batteries) Even then, the effect sound outputs normally. Additionally, there was some scratchiness in the brilliance knob, but it disappeared after turning it a few times. It might return if left unused for a while. The exterior is in relatively good condition for its age, but there are some scratches. Please check the images. Body only. I have checked the operation before listing, but it is an old electronic device. No claims, no returns accepted.