Product details:

Handheld GPS Units by Garmin. Details:The eTrex 10 makes a great choice in handheld navigation for the budget savvy outdoor enthusiast. This eTrex model is equipped with a high-sensitivity GPS receiver, a 2.2-inch monochrome display, and a worldwide basemap making it easier than ever to see where you are and where you have been. Garmin Connect compatible (online community where you analyze, categorize and share data).Rugged handheld navigator with preloaded worldwide basemap and 2.2 inch monochrome display.
WAAS enabled GPS receiver with HotFix and GLONASS support for fast positioning and a reliable signal.
Waterproof to IPX7 standards for protection against splashes, rain, etc.
See high and low elevation points or store waypoints along a track (start, finish and high/low altitude) to estimate time and distance between points.