Mint condition comes with box and paperwork. 

The MXR Bass Envelope Filter delivers retro-infused funk tone in an easy-to-use pedal built for bass. The M82 provides classic envelope filter sounds designed specifically for bass guitar. Separate Dry and FX knobs enable you to blend just the right amount of direct and effected signal, so you can bring the funk without losing your low end. Access a wide range of tones with Decay, Q and Sensitivity controls that conform the effect to your instrument and playing style. It can withstands voltage mishaps and features true bypass switching to maintain signal integrity when disengauged. Compact, lightweight aluminum housing maximizes pedalboard real estate. Funk up your bass tone.