This is a BOSS ME-6 multi-effects processor for guitar. It came out of my parents' house. I used it when I was in junior high school, so it's 32 years old. I've confirmed that it works, but some buttons have poor contact and there are some issues. It doesn't have the original AC adapter, and it requires an AC/AC 12V 500mA adapter, which is rare these days. The power input is 6.3mm outer diameter and 3.0mm inner diameter, which is quite unusual, but I found online that it can also work with a DC power supply. I tested it with a 9V 500mA power supply. I used a dedicated socket to convert the current standard 5.5mm outer diameter and 2.1mm inner diameter to 6.3mm & 3.0mm. I will include this dedicated socket. If you have the original adapter, it might work perfectly. Since I'm not sure about that, I'm selling it as junk. Unlike today's high-tech multi-effects, it has only the essential buttons and effects, so you can operate it intuitively just by looking at the panel. You can add the necessary effects and it will still be useful today. The exterior has some scratches, but it's in good condition. The power supply and cables are not included. Only the unit and the conversion socket are included. Please ask any questions in the comments. Type: Electric Guitar Brand: BOSS