If you are looking for one unit that will work for all your vehicles, Car, Bike, ATV and Snowmobile, check out the Garmin Zumo series. They were designed for use on a motorcycle and are waterproof, vibration proof, and most importantly, the touch screen works with gloves on. It comes with a mount for the bike/atv/snowmobile and another mount (quick release suction cup) for the car. Also has built in bluetooth, MPS player and room for a digital card for expanded memory. 4" touch screen. I have even used mine on my jet ski in the summer. I am more than happy with mine. alot easier to glance at and read than my little rino 530 screen.