Garmin Colorado 400C Handheld GPSWhether youâre sailing the high seas or hiking the backcountry, the Garmin Colorado 400C Handheld GPS is your all-in-one adventure guide. Preloaded with BlueChart® g2 coastal charts, Colorado is made with the saltwater mariner in mind. Packed with features, it includes 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. When the going gets tough, Colorado leads the way.