A gps and glonass compatible receiver allows the etrex to rapidly attain accurate positional information with access to 24 more satellites the device supports paperless geocaching with full gpx file alignment the etrex is a remarkably tough and reliable gps system that is perfect for beginner geocachers and walkers features a rugged fully functional handheld gps supports paperless geocaching just download the gpx file from geocachingcom upload it to your device and start your hunt 22