iMirror GHK-043LA-ON Car Rearview Mirror with 4.3" LCD Display Mirror Monitor Specially Designed for GM On-star This Replacement Mirror Monitor is so good looking you'll catch yourself looking at it rather than the reflection. Its 4.3" monitor is placed to the left of the mirror while the entire surface is reflective and acts as a mirror. For an absolute perfect backing up experience, this monitor comes with adjustable grid lines, allowing you to adjust the grid lines to be completely accurate regardless where you mount the camera. OEM Style Mirror Monitor provides ultimate performance together with a clean, factory like install. It attaches to the windshield, replacing the existing rear view mirror and its bright screen and reflective ability contribute to an all-in-one backup experience. It comes with a 4.3" Color TFT Digital Display and its distance grid lines are optional and adjustable. Original equipment look and good quality, clear and colorful picture, automatic activation when selecting reverse The LCD monitor brightness adjustable automatically in daytime and night with special mounting bracket to fit for special car for replacement easily