The power supply to the reversing light is not pure DC power supply, but a pulse signal is superimposed on top oscilloscope can be used to test if the conditions will it found a similar squarewave signal. Camera power supply line directly on the reversing light, because the working voltage is very unstable cause the camera does not work properly, the video signal output is also not normal, so the host can see there is a severe interference, jitter, or not to switch reversing screen.Features:100% brand new, stabilized DC 12V/5V-36V power filter rectifier for car rearview camera.Used to supply the stabilized DC 12V/5V-36V power to the rear camera.To solve the iue of the "screen cyclowarp" or "black screen" when using a rear camera reversing.Profeional manufacturing, high characteristic and stable performance.Easy to install, input connect with reversing light positive and negative, output wire connect with camera positive and negative.Specifications:Condition: 100% Brand NewMaterial: PlasticColor: BlackSize: 4.8 * 2.6 * 1.5cmPackage Weight: approx.17gPackage List:1 * RectifierInstallation Method:Input Red Wire: Reversing Light Positive PoleInput Black Wire: Reversing Light Negative PoleOutput Red Wire: Camera Positive PoleOutput Black Wire: Camera Negative Pole