Toyota 2007 Camry Hybrid Owner's Manual page 226

4. On−hook switch
When the hands−free system is on, push-
ing the on−hook switch turns the hands−
free system off.
5. Microphone
The microphone is used when talking on
the phone or using the speech command
system.
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'07Camry hybrid_U (L/O 0610)
2007 CAMRY HV from Oct. '06 Prod. (OM33749U)