There are 6 different model's of tom to .
go to Tom Tom .com to read about it
I have the PIONEER AVICN3, I think that nothing even comes close to the ability of it. Navigation, live nav traffic, split screen backup camra, vehicle dynamics,
cd, DVD, MP3, XM radio, memory navigation, 12 million way points, including fuel, rest areas, shopping, fast food, fine dining, Repair facilitys, car rental, ect.
also can send nav, or audio/video to other screens in my coach. Fold away screen. Really KOOL System. It's worth every penny I paid! Toy Factor Value
worth it! My wife loves it so much, she actually loves taking trips in the bus just to use it!http://parts.pioneerelectronics.com/model.asp?modelNum=AVICN3