This is the BOSS chromatic tuner TU-3! I'm selling it to declutter. It can be used for both guitar and bass. It also has a mute function. I bought it new from a musical instrument store about a year and a half ago and was using it until about 3 months ago. There aren't any noticeable scratches, but there is some paint chipping. The only issue is that there are two places to plug in the AC adapter (in and out), but it doesn't fully plug into the "in" jack. I was using the "out" jack, and there were no problems with the operation. The box, instruction manual, and a 5-year warranty (about 2 and a half years remaining) are also included! Please consider it!