A display for providing information relating to an object relative to the display is disclosed. A controller unit has an integrated circuit configured to control the operation of the screw drive mechanism and report the status of the door to a central location. The output supplied from the mixing circuit to the ignition plug is supplied in a manner in which the microwave energy and the high-voltage pulse are superimposed on each other on a same transmission line. According to one embodiment, road slope may be calculated based upon vehicle acceleration and acceleration caused by pedal depression.