BC DH3.1 AHD (rear bumper camera) is equipped with high end 1/3" 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. Compatible with AHD and SD installs C-MOS Sensor A CMOS sensor is an electronic chip that converts photons to electrons for digital processing. BC DH3.1 AHD incorporates a highly efficient color sensor and modern electronics, reducing power consumption.