DESC: Get the powerful, expandable mapping pocket-sized GPS. The Magellan eXplorist 400 features mapping capabilities and unlimited storage via optional secure digital (SD) cards so you can take as many maps with you as you want to. Add detailed street maps, topo or lake maps using optional Magellan MapSend software. The high-speed USB data port makes downloading information easy and the Geocache Manager software enables you to download caches directly to your eXplorist 400. eXplorist 400 has 8 MB of built-in maps and 8 MB of internal memory to save 5 track log files, 20 routes and 500 points of interest, but you can save as many as you need to optional SD cards.