Wiring Method --- Input Red Wire: Reversing Light Positive Pole; Input Black Wire: Reversing Light Negative Pole; Output Red Wire: Camera Positive Pole; Output Black Wire: Camera Negative Pole Simplify installation steps, no modification, cutting, or drilling required Premium Quality --- DC Car Rearview Camera Power Relay Capacitor is made of premium plastic material, this power relay capacitor rectifier is sturdy, it is not easy to aging and abrasion resistant,which ensures maximum strength and durability for long lasting usage. Perfect Compatibility --- The reverse camera relay can used to supply the stabilized 12V DC power to the rear camera, perfect suitable for car rearview camera of Germany/American Car Series. Size: 4.8 * 2.6 * 1.5cm/1.9 * 1.0 * 0.6in Powerful Function --- The 12v power relay capacitor rectifier adopts professional manufacturing with high characteristic and stable performance. And the power relay capacitor rectifier can solve the issue of the "screen cyclowarp" or "black screen" when using a rear camera reversing. Product Specifications --- Material: plastic; color: black; size: 4.8 * 2.6 * 1.5cm/1.9 * 1.0 * 0.6in; package weight: approx.17g; fitment: for Germany/American car series.