In a life-threatening emergency, pressing the SOS button connects you directly with the Garmin Response center, which coordinates Search & Rescue efforts globally.Two-Way Messaging: Text family, friends, or emergency contacts using the Iridium satellite network. It also links with the Garmin Messenger app on your smartphone for easier typing. If you get lost in the backcountry, the device’s built-in digital compass and TracBack feature can navigate you safely back to your starting point along the exact path you cameLoved ones at home can track your progress using your public MapShare page. Pull detailed weather forecasts for your current location or future waypoints directly to the device. Highly efficient battery that lasts up to 14 days in default 10-minute tracking mode, and up to 30 days on a 30-minute interval setting