The Magellan Triton 500 retails for $249.95. Like all Tritons, the 500 works with National Geographic TOPO! This GPS unit is waterproof like all the other Magellan Tritons and is very durable. It also has a 2.2" screen and expandable SD card slots for additional maps. The Magellan Triton 500 has a barometer and 3-axis electronic compass. Grab yourself a Magellan Triton 500 for your next venture in the great outdoors. Go Play!