For serious athletes and adventurers who want to do more, not wear more ? f?nix 5S is the perfect fit. It?s our premium multisport watch that offers full-size performance in a lighter, sleeker, more compact design. So you can beat yesterday with advanced features such as wrist-based heart rate?, built-in activity profiles, navigation functions, and performance metrics that measure the effectiveness of your workout. It?s one smart sport watch you can comfortably wear anywhere ? office or outback ? to keep pace with your active lifestyle.