Go longer than ever with solar charging that gives you unlimited battery life in smartwatch mode (assuming all-day wear with 3 hours per day outside in 50,000 lux conditions) | Battery life: in smartwatch mode, unlimited with solar charging in 3 hours of direct sunlight (50,000 lux) per day; in GPS mode, up to 48 hours with solar charging continuously in direct sunlight (50,000 lux) | Built-in sports apps to take on running, biking, swimming, strength training and more; plus, VO2 Max and other training features | Live the ultimate connected life with smart notifications and Connect IQ compatibility when paired with your compatible smartphone. | Track your adventures with the built-in 3-axis compass and barometric altimeter, plus multiple global navigation satellite systems (GPS, GLONASS and Galileo) | Understand your body better with all-day health monitoring features that track your heart rate, sleep, Pulse Ox, respiration and more (Pulse Ox not available in all countries. This device is intended to give an estimation of your activity and metrics; it is not a medical device) | Extend your battery life and your time doing what you love using the power manager to see how settings and sensors impact your watch’s battery life and make changes on the fly | Rugged GPS smartwatch is water-rated to 100 meters and thermal- and shock resistant with fiber-reinforced polymer case and scratch-resistant Corning Gorilla glass