Garmin epix Pro Gen 2 GPS Smartwatch -Conquer every hour of the day with advanced training features, 24/7 health and wellness monitoring, and up to 31 days of battery life in smartwatch mode (depending on case size). See it all on a stunning AMOLED display in a rugged watch case designed to endure. Features Battery life for each case size: 42mm: Get up to 10 days in smartwatch or up to 20 hours in GPS mode.; 47mm: Get up to 16 days in smartwatch mode or up to 30 hours in GPS mode.; 51mm: Get up to 31 days in smartwatch mode or up to 58 hours in GPS mode.; ; Screen size based on case size: 42mm: 1.2in; 47mm: 1.3in; 51mm: 1.4in; ; Built-in led flashlight - variable light intensities and a red safety light give you greater awareness while you train in the dark and can provide convenient illumination when you need it. Strobe mode can even match your running cadence.; The ecg app uses sensors to record the electrical signals that control how your heart beats. It analyzes that recording to detect signs of an irregular heart rhythm called atrial fibrillation (afib).; Endurance score - this feature measures your ability to sustain prolonged efforts and combines training data from all your athletic pursuits to help you understand how training impacts your overall endurance. This dynamic measurement uses your vo2 max, short-term/long-term training loads and other factors to gauge your fitness progress beyond just vo2 max.; The resilient athletic design features a bright amoled display, responsive touchscreen, traditional buttons and fiber-reinforced polymer case with a steel bezel and rear cover. The watch is tested to u.S. Military standards for thermal, shock and water resistance.; Hill score - measure your capability for running uphill, and evaluate your progress over time based on your vo2 max and training history.; Get an estimate of what your pace could be for a 5k, 10k, half-marathon and marathon.; Pacepro technology - plan race-day strategy with gps-based pace guidance for a selected course or distance.; Climbpro feature - see real-time information on your current and upcoming climbs on downloaded courses.; Grade-adjusted pace - get your equivalent running pace at the same effort on flat ground or when ascending.; Training readiness - from the moment you wake up, get a readiness score based on your sleep quality, recovery, training load and more, so you can determine whether it’s a good day to go hard — or take it easy.; Training status - get insight, and know whether you’re training productively, peaking or strained.; Gauge your performance with advanced training metrics such as vo2 max, training load and more.; Prevent burnout, and use this data to track and manage your exertion.; View your entire week of daily suggested workouts, which adapt after every run or ride.; Know how long you need to recover before your next high-effort workout based on your latest training.; Race widget - prepare for your next race with training tips, personalized daily suggested workouts and more.; See how much power you’re applying to the trail or road so you can manage effort and fine-tune training.; Garmin coach - train for an event, achieve a milestone, or improve your fitness with garmin coach training plans for runners and cyclists.; This feature automatically detects sport changes between swim, bike and run in multisport activities — so you can focus on the race and let your watch take care of recording splits.; Use preloaded activity profiles to get data and insight from your active pursuits. You can now track team sport activities such as soccer, football, racquet sports and more.; Track your hiit workouts, including amrap, emom, tabata or custom workouts.; Follow animated cardio, strength, yoga and pilates workouts on the watch screen.; Backcountry ski and snowboard - automatically track ascents and descents along with how much time you spend between runs.; Xc ski dynamics - measure exercise load when paired with an hrm-pro plus chest strap (sold separately).; Record the number of waves surfed, maximum speed reached, distance traveled and more.; Surfline camera - create a video of every wave you ride in front of a surfline camera with surfline sessions technology. Use the surfline widget to see tide, wave height, wind and surf rating for each of the five nearest surf spots.; Mtb dynamics - track the details of your ride with specialized grit and flow measurements.; Subscribe to outdoor