Description of Garmin Colorado 400t GPS Take on the trails with Colorado 400t. This rugged, advanced handheld is packed with detailed topographic maps for all your hiking adventures not to mention 3-D map view, a high-sensitivity receiver, barometric altimeter, electronic compass, SD™ card slot, picture viewer and color display. Exchange tracks, waypoints, routes and geocaches wirelessly between similar units. When the going gets tough, Colorado leads the way. Features: Rock n' Roller input wheel WAAS-enabled GPS receiver Built-in electronic compass Share wirelessly