This is a desktop multi-effects processor from BOSS. It can be used for practice at home or for recording. You'll probably want a separately sold footswitch if you plan to use it in a studio or live. I was using it as an audio interface, but I haven't had much opportunity to use it, so I'm going to sell it. The contents include the main unit, adapter, instruction manual, and box. The main unit has no noticeable scratches or stains. It works without any problems. Please note that one of the rubber feet on the back is missing (top left in the third photo). Please refer to the manufacturer's website for product details. BOSS GT-001 Guitar Effects Processor #BOSS #BOSSGT_001GuitarEffectsProcessor