With a big, sunlight-readable 1.4” display that's 36% larger Than previous Fenix® models, The Fenix 6x Pro and Fenix 6x sapphire multisport GPS watches add mapping, music and more to your workouts. They offer training status, running/cycling dynamics and environmentally adjusted Vo2 Max estimates. Both models feature a first-of-its-kind pacepro™ feature that helps keep your pacing strategy on track, Providing grade-adjusted guidance as you run a course.