Nokia MD-9 Manual Del Usuario página 5

ENGLISH
speaker cable, turn the cover to the direction indicated by arrows, and lift
the cover. To install the batteries, insert them as indicated in the battery
compartment. To close the battery cover, align the slot at the side of the
cover with the speaker cable, press the cover against the speaker, and turn
the cover to the opposite direction.
To remove the batteries, open the battery cover, and lift the batteries from
the compartment.
During long periods where the speaker is not used, remove the batteries
to prevent damage from battery leakage.
Use the speaker
Lift the audio plug from the slot at the bottom of the speaker, and uncoil
the speaker cable.
To connect the speaker to a compatible Nokia device that has a Nokia 3.5
mm AV connector or a compatible device (such as a PC or music player)