The Exporist 300 features Magellan TrueFix technology for superior accuracy and reliability with advanced tools for even easier navigation. The barometer and thermometer provide information on changing weather. The 2-axis barometer pressure altimeter easily determines your present elevation. And the electronic compass shows your direction, even while standing still. Explorist 300 includes 8 MB of built-in maps, 3 navigational screens and 8 MB of memory to save 5 track log files, 500 points of interest and 20 routes.