Acura MDX Owner's Manual page 435

uuRemote Control and Wireless Headphone Care
■
Wireless Headphone
If there is no sound coming from the wireless headphone, replace the battery.
Cover
Battery
434
* uReplacing the Battery
Battery type: AAA
1. To open the cover, insert a coin in the slot
and twist it slightly to pry the cover away
Coin
from the earpiece.
2. Make sure to replace the battery with the
correct polarity.