Lexus 2003 LS Owner's Manual page 342

IN CASE OF AN EMERGENCY
At the start of recording, "Recording" will be announced. At the
end of recording, you will hear "Recording complete". If there
are only 15 seconds left for recording, two chimes sound. If the
recording memory is full, "Recording time exceeded" will be
announced and recording will be terminated.
If you push this button while you are hearing a playback of
recording, it terminates the playback and recording will start.
At this time, the previous recording will be erased.
"PLAY" button: Push this button to play the recorded
conversation. "Playback Complete" is announced when the
playback is complete. To stop the operation, push the button
again. "Playback Cancelled" is announced. The volume has
a total of seven positions/levels available.
"– VOL +" button: Push this button on either side to adjust
the volume. When you change the volume, one chime sounds.
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