[Professional quality] - The relay filter rectifier is made of high precision components with plastic shell, sturdy construction, waterproof design, good abrasion resistance, high quality for a long service life [Easy to Use] - Easy to install, no modification required. Just read 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] - The car rear view rectifier can effectively supply 12V DC stabilized power to the rear view camera, helping to solve the "cyclowarp screen" or "black screen" problem when using a rear reversing camera . Professional camera rectifier with high characteristic and stable performance [Check compatibility first] - The 12V power relay filter rectifier can be used to supply 12V DC stabilized power to the rear view camera. car rectifier for Germany / 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 Colour:Black+red Material:plastic Size:48 x 16 x 26MM Package Contents: 4 x Rectifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.