SEIKO SAT800 chromatic tuner. It's quite old. Although it's unused, I opened it and put in batteries. The red and green lamps and the backlight turn on, and it seems to work normally. The included batteries are expired. Please be aware of this. The box has some damage. This is a personal item that has been stored for a long time, so please understand this before purchasing. To avoid unnecessary trouble, please purchase this item only if you understand how to use it. Please check the manufacturer's website for details. Just in case, please refrain from purchasing if you are overly concerned about minor details. 120 (W) x 80.4 (H) x 23.8 (D) mm (including protrusions)