Please check the manufacturer's website for details. It can play four sounds: a ping-pong sound (like the 7-Eleven entrance chime), two melodies (including the FamilyMart entrance chime), and a "pilo-pilo" sound. The volume can also be adjusted. Although it is unused, the outer box has discolored due to long-term storage. There are no discolorations on the main unit, but there are some minor scratches and slight rust on the battery terminals. Operation has been confirmed with alkaline batteries.