4x4 COMPOSITE VIDEO STEREO AUDIO MATRIX SWITCHER
This video switcher is a good budget friendly way to solve the confusion of hooking up aftermarket audio-video equipment in your car.  In my situation I had two independent headrest monitors with Sirius Backseat TV and a separate DVD player, and my car stereo's one auxiliary input with the Sirius radio and iPod.  There was no easy way to handle all that before I found this product.    Installation is advanced.  It comes with 4 AV cables, a remote, and an external IR sensor.  It does not come with any power 