WARNING! The audio module includes two AAA batteries (2 x 1,5V = 3V). If the audio does not play the batteries may need to be replaced. Batteries should be replaced by adults only. Batteries are small and could possibly be ingested, so a child should never use this product unless the battery compartment has been properly secured. To replace the batteries, loosen the screw on top of the module and remove the battery door. Remove the exhausted batteries and install new batteries using the correct polarity displayed on the battery door. WARNING! Only use batteries of the same or equivalent type 2 x AAA. Do not mix old and new batteries. Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel-cadmium) batteries. Rechargeable batteries are only to be charged under adult supervision. Rechargeable batteries are to be removed from the toy before being charged. Do not short circuit the supply terminals.