A lighting device includes a light source, a chassis housing the light source, and a reflection sheet provided in the chassis. To prevent the voltage regulator from drawing excess current and energy from an RF field in which the communicator is present the voltage regulator is controlled to provide a chosen impedance characteristic. A trench is formed on the isolation region. In another aspect, the tactile element oscillates to indicate status. The at least one computer is operative to store in a storage device, information associated with at least one of the mobile phone signal transmitted from the vehicle; and the at least one image of the vehicle. Write cycle times are maximized thereby allowing increases in burst mode operating frequencies.