GPS units are the latest fad, and while many of them are superb, they have, for my application, one serious flaw: They don't offer a wireless remote antenna. In my case, our Class C motorhome with cab overhang precludes dash mounting unless a 16' cable is strung across the dash, up through the bed, then dangled from the skylight to insure a signal. Trashy. In addition to a neat install, a w/less set up would offer numerous advantages, such as a simple switch to your car or having the monitor elsewhere in the coach. I believe the mfgrs. know this and would prefer that you buy several units rather than go thru the hassle.Let's face it, wireless remote technology has been around for many years. I'll wait.