Power converter - 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 install with no modification required. Wire configuration: red wire input connects to reverse light positive pole, black wire input to reverse light negative pole, red wire output to camera positive pole, and black wire output to camera negative pole. Provides a stable 12V DC power supply to the rear view camera, helping to prevent screen distortion or black screen issues during use. Designed for reliable performance and compatibility with various vehicle models. Suitable for use with 12V systems. Ideal for many German and American car series. Dimensions: 4.8 x 2.6 x 1.5cm (1.9 x 1.0 x 0.6 inches). Type: Cable adapter Voltage: 12V Color: Black and red Material: Plastic Size: 48 x 16 x 26mm Package includes: 1 x Rectifier (other items not included) Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowance is +/- 1-3cm.