| 摘要 |
PROBLEM TO BE SOLVED: To provide a wrist watch by which a radio wave incoming call to a portable device is surely notified to the possessor or lose of the portable device can be prevented in advance. SOLUTION: A wrist watch 10 for monitoring a portable device that is mounted on a wrist of the possessor and used is capable of conducting radio communication with a portable telephone set 12 of the same possessor. On the arrival of an incoming call to the portable telephone set 12, the portable telephone set 12 communicates it to a vibrator 14 by a radio signal and the vibrator 14 senses it to vibrate the wrist watch 10, thereby allowing the arrival of the incoming call to be informed immediately to the possessor of the portable telephone set 12. |
