PROCO / RAT2 Distortion This is a guitar effects pedal. As you can see in the photos, I've confirmed that it works normally for this listing. The box is in poor condition, but the pedal itself was kept inside an effects board. I purchased it in 2003, the serial number is in the 250,000 range, and it's made in the USA. For power, there's a cable to convert a 9V battery to an AC adapter jack, but using it prevents the battery cover from closing properly. I've been using it like that, not knowing if that's normal. The AC adapter jack between the IN and OUT jacks is sealed with a screw. Thank you. (The pencil in the photo is there to hide the serial number.) ■ Controls: Distortion, Filter, Volume Type... Electric Guitar