A spring plate may be provided between a bolster plate and a board in order to mount components on the opposite side of the board. The method includes tracking a total usage time of a short-range wireless connection between a telematics unit and a portable wireless communication device, sending the tracked total usage time from the telematics unit to a call center via a wireless connection and generating a usage bill at the call center based on the total usage time. Additionally included is a second layer in which a plurality of surfaces is constructed using a translucent and conductive material. A switching amplifying section controls connection and disconnection of a DC current based on the pulse modulation signal as a control signal so as to perform switching amplification for an output signal of the linear amplifying section and supply the resultant signal as the power supply voltage to the radio frequency amplifier. The cellular phone acquires peripheral map data including the position of the owner of the vehicle and the position of the vehicle where the vehicle navigation apparatus is mounted from a position information center and displays the data acquired together with the data on the positions.