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The affordable Lowrance Endura Out&Back GPS is easy to use right out of the box. It's ideal for hiking and geocaching without draining your budget. Full-color, transflective touch screen offers easy viewing and accesses intuitive, straightforward menus. Recording function saves trails and routes in a format that is easy to recall and share. Geocaching application offers paperless geocaching with Geocaching.com content; and stores up to 3,000 geocache locations. Accepts plug-and-play microSD cards (sold separately), public domain downloads and community-based content such as GPX trails, routes and general points of interest. Drag and drop shared community content in GPX format from the web, including routes, trails, points of interest and elevation data. Durable design is waterproof to IPX7 standards (immersion in 1m of water for up to 30 min.). Lowrance Endura Out&Back GPS runs on 2AA batteries (sold separately) with an average battery life of 10 - 15 hrs.