Made of components with plastic shell, sturdy construction, waterproof design and good abrasion resistance for long service life. Easy to install, no modification required. 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). Effectively supplies 12V DC stabilized power to rear view cameras, helping solve "cyclowarp screen" or "black screen" problems when using rear reversing cameras. Stable performance with high characteristic. Compatible with 12V DC power supply, suitable for Germany/American car series. Size: 4.8 x 2.6 x 1.5cm / 1.9 x 1.0 x 0.6inch. Package Contents: 1 x Rectifier. Color as shown. Note: Light and different displays may cause the color of the item to differ slightly from the real thing. Measurement allowed error is +/-1-3cm.