Honda PILOT 2021 Owner's Manual page 673

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Wireless Headphone
If there is no sound coming from the wireless headphone, replace the battery.
Cover
Battery
Battery type: AAA
1. Remove the screw.
2. Open the cover.
3. Make sure to replace the batteries with the
correct polarity.
uuRemote Control and Wireless Headphone Care * uReplacing the Battery
671