GPS MAGELLAN TRITON 500

Amazing ease-of-use - Reinventing handheld GPS™ , simple menus, instant access buttons, intuitive keypad and crystal clear graphics let you navigate without the need for a Ph.D. 3-axis electronic compass - Clearly see your direction no matter how you hold your GPS, even when standing still Barometer - Sensitive barometric pressure readings offer advance notice of changing weather and assists in providing accurate elevation Full-color 2.2" display - The large display shows maps, simple menus, navigation screens and other data in brilliant color SD-card compatibility - An invaluable feature enables you to use an unlimited amount of map data for topographic and marine navigation. Add detailed maps - Upload optional marine cartography, topographic maps, and more, including the highly-detailed and feature-packed National Geographic TOPO! State series and Weekend Explorer 3D maps to your OWN SD cards Built-in maps - Basemap of the 48 contiguous United States, Alaska, and Canada ( major highways, city centers, bodies of water and more) plus worldwide geographic boundaries 3-meter accuracy - SiRFstarIII™ chipset and integrated multidirectional antennae offer superior GPS accuracy using the Wide Area Augmentation System ( WAAS)