回答“What battery does the device use?”The Munchkin Mozart Magic Cube takes needs 3, Alkaline, AA batteries.
回答“How to control the volume?”The Munchkin Mozart Magic Cube does not have a volume control, however, the volume is not too loud.
回答“How to change the batteries?”To change the batteries, use the J-1 Phillips head screw driver to loosen the two screws on the ON/OFF plate. Remove the ON/OFF plate then remove the battery pack directly behind it. The batteries will be inside the pack.