The RGB7+ is a universal interface for converting composite video to RGB (RGBS: red, green, blue, sync). It will also retain any factory image, and only displays input signal when triggered. 

The BMW V+ interfaces 1 video input and 1 rear camera input into the factory media screen in select BMW (and others) vehicles. 

The RGB-HON+ interface adds 2 video inputs to the factory media screen in select Honda's.

The RGB2+ is a universal interface for converting composite video to RGB. It will also retain any factory image, and only displays input signal when triggered.