A lightweight audio player for vehicular application is virtually \u201cfastenerless\u201d and includes a fold-up case formed of polymer based material molded to provide details to accept audio devices, as well as the circuit boards required for electrical control and display. A spatial data analysis and modeling module is provided which allows users to interactively and flexibly analyze and mine spatial data. The strobe includes a strobe microcomputer that acquires information on characteristics of the color filter attached forward of the light emission section, and transmits the acquired information on the characteristics to an image pickup apparatus on which the strobe is mounted. The position monitoring system also includes a controller configured to receive the position signal and the movement signal, detect an unavailability of the position signal, calculate a position parameter, determine whether a difference between a first and a second value of a parameter exceeds a predetermined threshold, and generate a warning signal.