4.5”CAR REAR VIEWER WITH METAL CAMERA(CMOS/CCD) THE SHOCK PROOF IS 5G THE HORIZONTAL RESOLUTION IS EQUAL OR ABOVE 450 LINES WITH THE FUNCTION PICTURE INVERT BETWEEN LEFT AND RIGHT DIM AND LIGHT CHOICE VOLUME ADJUSTING WITH A MICROPHONE DEFROST AND FROSTBITE PREVENT AUTOMATICALLY WITH RAINPROOF FUNCTION THE S/N PERCENT IS ABOVE 48dB