a rec fresh circulation of air in the interior of a car or introduction of air from the exterior of the car in this instance although the description is made of the operations of the car audio system and the air conditioner it is possible to operate other vehicle mounted equipment such as a navigation system and a power window system and the object to be operated can properly be selected through a mode switch 19 see fig2 installed additionally on the steering wheel 1 in the case that vibrations are transmitted to the body of the steering wheel 1 since the body has a large volume and is heavy if the vibrations are transmitted directly thereto the vibrations tend to become weak on the other hand if the vibrations are transmitted to a vibration transmission cover which is of a relatively small volume and is relatively light strong vibrations can be given to the driver gripping the vicinity of the vibration transmission cover by his hands thus a vibration transmission cover 13 made from a plastic sheet is placed on a lower surface in the vicinity of central portions of right and left hand outer circumferential section of the steering wheel 1 and as shown in fig2 a solenoid 15 serving as a vibration source is disposed through an elastic member 14 such as a rubber a cellular resin and a cloth on the inside of the vibration transmission cover 13 as shown in fig1 a vibrator 17 is placed through a coil spring 16 on a tip portion of the solenoid 15 the vibrations from the vibrator 17 driven.