Worldwide basemap 2.2" 65K color, sunlight-readable display GPS and GLONASS satellites for faster positioning Paperless geocaching 25-hour battery life with 2 AA batteries The new eTrex series is the first-ever consumer-grade receivers that can track both GPS and GLONASS satellites simultaneously. GLONASS is a system developed by the Russian Federation that will be fully operational in 2012. When using GLONASS satellites, the time it takes for the receiver to lock on to a position is (on average) approximately 20 percent faster than using GPS. And when using both GPS and GLONASS, the receiver has the ability to lock on to 24 more satellites than using GPS alone ith its microSD card slot and 1.7 GB of internal memory, eTrex 20 lets you load and hit the trail, plug in preloaded cards for a great day on the water or City Navigator NT map data for turn-by-turn routing on roads (see maps tab for compatible maps). eTrex 20 also supports (subscription required), that lets you download satellite images to your device and integrate them with your maps.
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