The Garmin eTrex 10 GPS is a rugged and waterproof satellite navigation system that boasts a compact design, meaning you can take it anywhere you go. The 2.2-inch TFT display is easy to read in any lighting situation, while the two AA batteries provide up to 25 hours of continuous use. The eTrex 10 supports geocaching, so you can store and display key information, including location, terrain, difficulty, hints and descriptions. There's no need to manually enter coordinates or keep paper print-outs. The eTrex 10 saves up to 50 itineraries and 1,000 waypoints, and has a log for 100 trails.