This camera is designed to clamp onto the tubular frame holding the wing mirror in place of some HGV vehicles. It uses the same 4 pin connector as on all our 12/24v vehicles. The camera operates at 12V which is normally supplied by the monitor. With infrared LEDs, 120 degree lens and a top quality 700 TVL Sony CCD sensor gives it a good image in both the day and night. At night the image is black and white aided by the IR LEDs. During the day it gives a nice sharp colour image aided by its composite glass lens.