Information is gathered from the vehicle, processed, and displayed on an LCD panel.
Keypad commands tell the system when to start and stop recording and allow data entry. A low-cost CF reader connected to a home PC allows transfer of the data, which can be manipulated using a readily available spreadsheet program or word processor. Web surfing and computer usage usually involve little physical motion or exertion. The keyboard surface itself is entirely passive. Detection of the keystroke is done optically, by scanning a matrix of infrared beams and determining which have been broken.