[Professional Quality] - The relay filter rectifier is made of high-precision components with a plastic shell, sturdy construction, waterproof design, and good abrasion resistance for long service life [Easy to Use] - Easy to install, no modification required. Connect according to the wire configuration: 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 the "cyclowarp screen" or "black screen" issue when using a rear reversing camera. Features high performance and stable operation [Check Compatibility First] - The 12V power relay filter rectifier supplies 12V DC stabilized power to the rear view camera. Suitable for German and American vehicle models. 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: 3 x Rectifier Note: Light reflection and different displays may cause slight color variation between the image and the actual item. Measurement error allowance is +/- 1-3cm