The Explorist 500 is waterproof, handheld GPS device which comes with USB data port. It also has a 16 MB of inbuilt memory. This GPS device comes with the map of North America in 8 MB; the rest space is free for buying new maps. The detailed maps come with roads, streets, waterways, parks, and much more. You can get unlimited secure digital (SD) card expansion. It is used for adding new maps via the Web or CD. The device comes with a screen that is sunlight readable because of high-contrast, backlit Liquid Crystal Display (LCD). You will also get a rechargeable Li-ion battery pack. This GPS device comes with a 1-year warranty. More about the features of Explorist 500: The Explorist 500 can save 5 track log files, 500 points of interests and 20 routes. This device features an area calculator which is useful in determining the accurate distance between saved POIs (Points of Interests). This feature comes in quite handy when you want to follow some hiking trails. Th...