Subaru 2010 Tribeca Owner's Manual page 66

Remove the battery cover on the left earpiece by loosening the screw with a flat-
head screwdriver.
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Remove the old batteries and install new ones (two AAA batteries). Pay careful at-
tention to the (+) and (–) marks on the battery case.
Reinstall the cover in position by tightening the screw with a flat-head screwdriver.
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Basic Operations
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