Some models of car will output voltage after the engine is started. The power supply to the reversing light is not pure DC power supply, but a pulse is superimposed on tops can be used to test if the conditions will it found a similar . The camera power supply line directly on the reversing light, and the host can see there is a severe , jitter, or not to reversing screen. Features -Color: Black. -Material: ABS, rubber, aluminum. -Size: About 5.00X2.50X1.50cm/1.97X0.98X0.59in. -Power: DC 12V. - It is manufactured with technology to ensure the high- of the product and can work for a long time. - Easy solution to your troubles. Provide you with more considerate design and service. - Designed for auto car rearview camera and use to the car rearview camera problem like "black screen". - Made of , it is durable, strong and practical with . - It is in stable characteristics, high performance and it is in great reliability, simple, easy to install. -Installation 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. Package list: 1 x rectifier