BC DH4.2 AHD (OE style rear number plate camera) is equipped with high end 1/3inch CMOS color sensor and is Element Ready. It is designed to withstand extreme weather conditions. It consumes very little power due to the design and use of modern circuitry inside.A CMOS sensor is an electronic chip that converts photons to electrons for digital processing. BC DH4.2 AHD incorporates a highly efficient color sensor and modern electronics, reducing power consumption.