A level shifter including a first boost circuit, an inverter, a second boost circuit and a level shift circuit is disclosed. The tie bar guides are secured to a window frame which includes an elongated groove that extends parallel to the tie bar. Moreover, a base station has a function to transmit the downlink shared channel data and signaling data received from a radio network control apparatus, to a mobile apparatus via a radio line. A cover plate secures the spinner to the rim of the vehicle wheel. Network rankings may also be provided to the driver in a real-time basis by the vehicle communication system.