[Professional Quality] - The relay filter rectifier is made of high-quality components with a plastic shell, sturdy construction, waterproof design, good abrasion resistance, and reliable performance for long service life. [Easy to Install] - Easy to install, no modification required. Just connect the wires as follows: Red wire input: reverse light positive pole / Black wire input: reverse light negative pole / Red wire output: camera positive pole / Black wire output: camera negative pole. [Good Performance] - This car rear view rectifier effectively supplies 12V DC stabilized power to the rear view camera, helping to solve issues such as "rolling screen" or "black screen" when using a rear reversing camera. Professional camera rectifier with high efficiency and stable performance. [Check Compatibility First] - The 12V relay filter rectifier supplies 12V DC stabilized power to the rear view camera. Suitable for use with German and American car series. Size: 4.8 x 2.6 x 1.5cm / 1.9 x 1.0 x 0.6inch. Type: Cables Adapters Voltage: 12V Color: Black + Red Material: Plastic Size: 48 x 16 x 26mm Package Contents: 1 x Rectifier Note: Light and display settings may cause slight color differences between the image and the actual item. Measurement allows an error of +/- 1-3cm.