[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. Wire configuration: red wire input connects to reverse light positive pole, black wire input connects to reverse light negative pole, red wire output connects to camera positive pole, black wire output connects to camera negative pole [Good Performance] - This car rear view rectifier effectively supplies 12V DC stabilized power to the rear view camera, helping to resolve issues such as screen distortion or black screen when using a rear reversing camera. Features professional-grade rectification with high reliability and stable performance [Check Compatibility First] - The 12V power relay filter rectifier provides 12V DC stabilized power output for rear view cameras. Suitable for use with German and American vehicle models. Size: 4.8 x 2.6 x 1.5cm (1.9 x 1.0 x 0.6 inches) Type: Cable Adapter 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 allows an error of +/- 1-3cm