BOSS Electronic Metronome [Model Number] DB-90 Dr. Beat [Included Items] Outer box, instruction manual, screws, battery 006P 9V Product Description ◆ Acquired used, initial operation was confirmed, but continued use was not pursued. Therefore, all operations and functions have not been confirmed. ◆ Appearance: There are no noticeable scratches on the main unit. The printing on the KEY pad is also hardly worn. ◆ Power-on operation: Although all operations have not been confirmed, certain operations (rhythm variation, sound output) are normal, and there was no blurring of the LCD display. Other accurate tests have not been performed. Please understand that this is a used item before purchasing. ◆ One test battery is included, but please install a new battery for normal use. ◆ There is a yellow stain on the instruction manual. It should not affect readability.