Several have mentioned the WalMart wireless license plate camera. Good luck. I bought one and took it back.
Problem one- the angle of view isn't wide enough to be really usefull as a backup camera IMO. If all you want to see is your trailer hitch it may do, but it won't show you the tree you are about to nail with the corner of the truck....
Problem two- the wireless transmitter isn't powerful enough to make it all the way from the back of a long bed crew cab pickup through all the steel to the dash, at least not with a great picture.
Plus features- it has a switch to reverse the view or not. I've also seen them on closeout much cheaper than WalMart- I think PepBoys had them at one point for something like $69. Apparently they weren't selling too well, or a lot were returned as mine was.
Wish it had worked better as I really like the idea.
