Described is a means for automatically tracking automobile mileage data on a computerized mileage manager module and wirelessly transmitting it to a mobile basestation or other external receiving device. An antenna may also be carried by the portable housing and connected to the satellite positioning signal receiver. The time to reach the midpoint voltage at a filter is simply equal to the charge stored at the filter divided by the total current, which is controlled by an N-bit digital input and a device aspect ratio of each triggering transistor. An electrical circuit may be mechanically mounted to the circuit mounting portion of the first substrate via the anisotropic medium with at least one electrically conductive terminal juxtaposed over the at least one electrically conductive pad. The sliders thus serve the dual purposes of guiding the motion of the table along the guide rail and braking the motion of the table. In one embodiment, the lighting system includes a frame member and a light member mounted in the frame member.