The StreetPilot 7200's huge 7-inch touch-screen display means you'll always see where you're going, from anywhere in the vehicle. Designed for larger vehicles such as RVs, semi-trucks, and buses, it is a premium automotive unit that comes preloaded with City Navigator NT detailed maps of North America. With the purchase of an Optional sensor (not included), the unit notifies the Driver of accidents, road construction and weather-related traffic delays before they are encountered (requires subscription, traffic service only for select cities where coverage exists). Either of two optional purchase sensors can provide these features, the GTM 10 FM TMC traffic sensor or the GXM 30 Smart Antenna (separate purchase required).