Designed for car rearview camera, use rear camera reversing to solve the problem like "black screen". Made of for long time and durable use. It has a simple design, but very practical in use, giving you a . Also can be a good present choice for your friends, they will like it. Features -Color: Black. -Material: ABS, rubber, aluminum. -Size: About 5.00X2.50X1.50cm/1.97X0.98X0.59in. -Power: DC 12V. - Stable design, creative 12 DC power relay filter rectifier for automotive rearview cameras. - It is used to provide a stable 12V DC power supply for the rear camera. - manufacturing, good , high performance and stable performance. - Solve the problem of "black screen" or "screen warping" when reversing with the rear camera. - Easy to install, the input terminal is connected to the positive and negative poles of the reversing lamp, and the output line is connected to the positive and negative poles of the camera. -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