Smart Mirror is an OEM style replacement Rearview Mirror, with an integrated 4.3" (16:9) High Resolution Digital LCD Screen. It has 2 camera inputs, one typically used for Rearview Camera with a priority input signal wire, to enable auto switching. The second input can be used for other AV sources, such as Digital TV or external media player. If you prefer not to clutter up your dashboard with clumsy add on screens and prefer something more elegant, this will provide the ideal solution to integrate your Rearview Camera and other AV sources. The mirror now also comes with patented adjustable guide line technology, so irrespective of where the rear view camera is installed, the lines can be adjusted individually, up/down, left/right or rotated to ensure a perfect installation.