Inexpensive backup camera w/ multicamera options

I have no affiliation with this company and I haven't purchased one, but what I found interesting is that it supports displaying up to four cameras on your iOS or Android device, and in the accompanying video, they demonstrate it working 80 feet away from the front of the car.



iPhone Android iPad WIFI car backup camera



The transmitter is separate from the camera, so I suppose one might be able to bring the transmitter up to window level to get better reception.