Do what you love, longer with Instinct Solar Surf Edition. This rugged GPS surf watch boasts solar charging giving incredible battery life and is water-rated to 100 meters. Dedicated surf features such as tide data and a surfing activity help you make the most of every wave. Multiple global navigation satellite systems (GPS, GLONASS and Galileo) help you track in more challenging environments than with GPS alone. Monitor how your body uses energy by tracking heart rate, stress, sleep estimates and Pulse Ox (this is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition). Get the most out of the sports you love with preloaded activity profiles such as surfing, running, biking, swimming and more. Smart notifications (when paired with a compatible smartphone) at the wrist keep you connected to what matters.