Boasting solar charging for incredible battery life when using smartwatch or Expedition modes outdoors, the rugged Garmin Instinct Solar GPS watch is designed to help you do what you love—longer. Built-in 3-axis compass and barometric altimeter—plus multiple global navigation satellite systems (GPS, GLONASS and Galileo)—help track in challenging environments Enjoy vastly extended battery life with solar charging—up to 54 days with solar, or up to 24 days without, depending on mode To make battery-extending changes on the fly, you can view how your chosen settings and active sensors impact your watch's battery life Stay connected with smart notifications (with a compatible smartphone, not included) and automatic data uploads to the Garmin Connect™ online fitness community Constructed to U.S. military standard 810 for thermal, shock and water resistance (rated to 100m) Monitor how your body uses energy by tracking heart rate, stress, estimated sleep and Pulse Ox Pulse Ox is not a medical device and is not intended to diagnose or monitor any medical condition Get more out of the sports you love with preloaded activity profiles to track running, biking, swimming and more