Honda 2012 Odyssey Owner's Manual page 384

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