This is a chromatic tuner that can be used for guitar, bass, and violin. It seems to be a Louis brand tuner, sold by Shimamura Music. It's an older tuner, but it comes with a cable clip, has no noticeable scratches, and works perfectly. I'm selling it because I no longer use it. Batteries are not included, so you will need two AAA batteries separately. Also, there is no instruction manual, but I think you can figure out how to use it by turning it on and playing around with the settings.