For athletes and outdoor adventurers the Fenix 5 Plus series watches are the high-performance way to beat yesterday and bring your maps and music along. These rugged premium-crafted watches feature routable color mapping wrist-based heart rate and storage for up to 500 songs Additionally Fenix 5X Plus is our first Fenix series watch to offer a wrist-based Pulse Ox sensor for blood oxygen saturation awareness at high altitudes.