This is a super-classic bass preamp, incorporated into the effect boards of many professional bassists using MXR. It's popular for the range of sound creation as a preamp and the depth when used as a distortion pedal, making it an effect unit you won't regret owning. I'm selling it because I've reduced the frequency of use after purchasing bass preamps and distortion pedals. It has been used, but there are no noticeable scratches, paint peeling, and I think it's in good condition. It was on my board until recently, so there are no operational issues. Professional-grade Velcro is attached to the back, allowing it to be firmly fixed to your effect board for stable use. Includes original box, instruction manual, and quick guide. Operation has been confirmed. No scratchiness in the knobs or issues with the jacks. Price is negotiable. Quoted from Sound House below: Bass Effect Pedal ■ Preamp/DI ■ Controls: (CLEAN channel) VOLUME, (DISTORTION channel) VOLUME, BLEND, TRIGGER, GAIN ■ Power: 9V battery, AC adapter (sold separately), Phantom +48V ■ Dimensions: 127 x 95.2 x 38.1mm