... 12V[Video Input]: AV1 to VCD/DVD(defaulted) ,AV2 to backup camera[Signal System]:PAL/AUTO/NTSC[Brightness ]:250cd/m2[Contrast Ratio ... engaged,the system automatically switches from DVD/VCD video to backup camera video ,and when parking is completed ,it switches back ... engaged,the system automatically starts on to find the camera signal and display backup video. When parking is completed , it switches ...