Incredible 10.4" diagonal screen. Super-sharp 640x480 pixel resolution for superior mapping detail. Full VGA, TFT, 256-color no-glare daylight viewable display. Big-screen, high-detail GPS+WAAS navigation, with recording and unlimited custom mapping. Precise 12-parallel channel GPS and WAAS positioning. Waterproof slots for two MMC or SD memory cards (one 16MB card included) to record GPS trip details, and to display custom mapping for navigation. Features all-new built-in background map with enhanced continental U.S. and Hawaii detail including nav aids. Instantaneous screen updates. Comes with GPS Mapping Accessories Pack to create higher-detail mapping on memory cards with 8MB-128MB capacities. Accepts optional Navionics XL Charts and HotMaps with depth contours. Stores up to 100 routes/100 waypoints/1,000 event markers. 34 map ranges/0.5-4,000 miles. Back-up memory. Protective cover. Sealed & waterproof. Full one-year warranty.