Onkyo Tuner T-7700 This item is quite old. There are no instruction manuals, etc. Only the main unit is included. Power-on has been confirmed, but since I don't know how to use it, please purchase it as a junk item. You might as well consider it a "junk item." Recommended for those who can repair it themselves or for parts. It has been left unused for a long time, so please purchase it with the understanding that there are stains and scratches. I will wipe off the dust where I can, but I can't wipe the small areas. There are no noticeable scratches. Please consider this item with the understanding that it is a used item.