Description of Garmin Colorado 300 GPS Gear up and explore the backcountry with the all-terrain Colorado 300. Packed with features, it includes a built-in basemap, high-sensitivity receiver, barometric altimeter, electronic compass, SD™ card slot, color display, picture viewer and more. Even exchange tracks, waypoints, routes and geocaches wirelessly between similar units. When the going gets tough, Colorado leads the way. Colorado 300 comes with a built-in worldwide basemap with shaded relief and accepts SD cards for all your outdoor activities on land or water. Just take your pick from Garmin’s preprogrammed SD cards including street maps, topographic maps, coastal charts or inland lake data. The card slot is located inside the waterproof battery compartment, so you don't have to worry about getting it wet. Features: Rock n' Roller input wheel WAAS-enabled GPS receiver Built-in electronic compass