**********Rugged GPS watch built to withstand the toughest environments*****Constructed to U. S. Military standard 810G for thermal, shock and water resistance (rated to 100 meters) *****Built-in 3-axis compass and barometric altimeter, plus multiple global navigation satellite systems (GPS, GLONASS and Galileo) support helps track in more challenging environments than GPS alone*****Monitor your estimated heart rate, activity and stress; train with preloaded activity profiles*****Stay connected with smart notifications (with a compatible smartphone) and automatic data uploads to the Connect online fitness community*****Use the TracBack feature to navigate the same route back to your starting point; use the Explore website and app to plan your trips in advance*****Battery life: up to 14 days in smartwatch mode, up to 16 hours in GPS mode, up to 40 hours in UltraTrac battery saver mode