Metronome with various rhythm patterns and tempo settings. - Model Name: DB-30 - Brand: BOSS Thank you for viewing. After a light cleaning before listing, the item's operation has been confirmed. The metal fitting/part on the back of the main unit for hanging is missing. (See photo 3) The items for sale are the main unit and the instruction manual. The batteries are included as a bonus, although they have been used. Also, as there is no outer box, the main unit will be wrapped in waterproof vinyl and bubble wrap for shipping. Shipping will be via anonymous Mercari delivery.