if you would like the ability to add another input device ie: DVD player you can use this unit
http://www.jpcustoms.com/store/custo...cat=772&page=1
the picture they use is of the old unit the newest one comes with 2 inputs.
if you plan on adding a DVD player you will also need an audio input device and you can pick one up from there as well.
i have the H2 cam as well as an indash DVD unit and enjoy them both. The input device will allow the backup cam to become the proprietary unit when the vehicle is placed in reverse and you may also wire it up to a switch so that you can check what is behind you while you are moving forward.