The Whistler WGPX-550 Color Touch Screen GPS gives you greater control over your life on the road. Its 3.5" color LCD touch screen lets you navigate on the map as you drive on the road. Get turn-by-turn directions and visual prompts get you where you are going, easily and safely. It comes preloaded with with Whistler mapping Software on a removable SD/MMC card -- featuring detailed maps with US cities, streets and special points of interest. This allows you to play your favorite songs or view travel photos on the color screen.