| 摘要 |
PROBLEM TO BE SOLVED: To raise warning for non-installation of a radio telephone set to the driver before driving an automobile. SOLUTION: A push switch 21 or the like is used to detect whether or not a radio telephone set 11 is placed on a hold base 10 in an automobile, and in the case that the radio telephone set 11 is not placed on the hold base 10 when the operation of an ignition key before driving and driving of the automobile by a vehicle velocity sensor 14 are confirmed, it is regarded as forget of installation and warning devices 16a, 16b are operated. |
