For athletes and outdoor adventurers who want the ultimate in a multisport on-wrist trainer the ultra-rugged Fenix 5X Plus is here. It s our first Fenix series watch to offer a wrist-based Pulse Ox Acclimation sensor a non-medical device that provides estimated blood oxygen saturation awareness at high altitudes. Other highlights include routable color Topo maps estimated wrist-based heart rate a music player that lets you store plus Garmin Pay and our contactless payment solution (available for supported cards from participating banks).