The Garmin Colorado 400c GPS Handheld Navigation System 010-00622-61 is an all-in-one GPS navigation system that was designed with the saltwater mariner in mind. The Garmin Colorado 400c is packed with features such as a 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.
With its high sensitivity, WAAS-enabled GPS receiver, the Colorado 400c by Garmin locates your position quickly and precisely and maintains its GPS location in the harshest marine environments. A built in compass on the navigation device provides a display of information even while you're still standing still, while its barometric altimeter tracks changes in pressure to pinpoint your precise altitude. You can even use the altimeter to plot barometric pressure over time, which can help keep an eye on changing weather conditions.
The Garmin Handheld Navigation System also features a Rock 'n Roller input wheel for easy one-handed operation and supports Geocaching.com GPX files for downloading geocaches and detail straight to your unit. Plugging in optional preloaded SD cards is also possible for all your outdoor activities on land or water. Just insert a MapSource card with detailed street maps along with turn-by-turn directions to your destination. The card slot is located inside the waterproof battery compartment, so you don't have to worry about getting it wet.