*Curve mirror (used at the corner of road to watch the traffic) with
heater on its back.
*CCD camera (monochromatic type, 250,000 pixel, sensitivity=0.05 lux) with
lens (6 mm, F 1.4 for C mount) and heater for lens. Heater for lens has
the timer.
*Clock with two mirrors
The image of clock is inserted into the image of video camera using two
mirrors.
*Two video recorders (VHS type, it is possible to record for 6 hours.)
*FM tuner radio (to supply the time voice to video recorder)
an example JN961230