Lexus LFA Owner's Manual page 23

NOTICE
To prevent key damage
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Observe the following:
Do not subject the keys to strong shocks, expose them to high temperatures by
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placing them in direct sunlight, or get them wet.
Do not expose the keys to electromagnetic materials or attach any material that
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blocks electromagnetic waves to the key surface.
Do not disassemble the key.
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1-1. Key information
21
1