BOSS DR-770 Rhythm Machine - Works perfectly. I purchased this a long time ago, but I didn't use it much and kept it in storage. I tested its functionality before listing it for sale (January 2, 2026). Regarding the input/output terminals, I confirmed the stereo mini and L/R OUT. I don't have the environment or equipment to test the others. All the buttons seem to be working fine. The exterior has some scratches, but there are no functional issues. The rubber feet on the bottom are missing, so I've attached commercially available non-slip pads. The items for sale are the main unit, AC adapter, and paper manual (with some discoloration). Please consider purchasing this item with the understanding that it is an older item.