used but all original and fully functional , this akai uni bass is a really cool pedal. Solid, well built and with a lots of cool sounds. Input gain and output level controls are key. For a cool ring mod kind of sound keep the input gain very low and play several tones at once. The “down a forth” function creates power chords which are cool for a synthlead type sound. The “up a fifth” is also cool. It creates this cool decay sound as the signal fades. Great for increasing the range of any instrument or generator.