12 V DC stabilised power filter rectifier for car rear view camera. This device acts as a power filter and current regulator to suppress vehicle voltage interference and provide a stable supply for the camera. Suitable for German and American cars. To solve black screen and interference: when the camera is powered directly from the reversing light, the supply can be unstable, causing improper camera operation and abnormal video output with jitter or no reverse image. This rectifier prevents screen flicker and black screen. Stable performance: professionally manufactured with high precision characteristics and reliable, stable operation. Easy installation: this mesh filter rectifier is easy to install. The input is connected to the positive and negative reversing light, and the output cable is connected to the positive and negative camera cable. Applications: 1) rear view camera setups where the reversing light supply is unstable, causing black screen or jitter; 2) vehicles with electrical noise or voltage fluctuations affecting camera video; 3) aftermarket rear view camera installations on German and American cars requiring a stable 12 V supply.