When you press the melody button, the theme song plays. When you press the whistle button, the whistle sound plays. Volume can be adjusted with the HI/LO buttons. Sound has been confirmed. Volume adjustment is located on the bottom of the locomotive, and you can adjust the volume by repeatedly pressing it. Includes 3 AA batteries. Will ship with batteries included. The part in the 12th photo is broken. Box is not included. Please check the photos for some minor scratches. Please understand that this is a used item.