- Magellan Triton 500 GPS navigation- Advanced full-color navigation that's amazingly easy!- 3-Axis electronic compass and built-in barometer offer enhanced navigation capabilities- SD-card compatibility enables use of unlimited optional detailed maps and other user generated content- Rugged and waterproof to take you anywhere- Simple menus- Instant access buttons- Intuitive keypad- Crystal clear graphics- Full-color 2.2" display: the large display shows maps, simple menus, navigation screens and other data in brilliant color- Add detailed maps: upload optional marine cartography, topographic maps, and more, including the highly-detailed and feature-packed National Geographic topo!- 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