With Fitbit Charge 4™, there’s no limit to how far you can go. This sleek, swimproof tracker is packed with features that help you know your workouts and your body better—like built-in GPS, Active Zone Minutes, a new exercise mode and sleep tracking. Plus, with Fitbit Pay™ and up to 7-day battery, you get more convenience on the go and more inspiration to reach your fitness goals.* *Water resistant to 50M. Battery life varies with use and other factors; up to 5 days with continuous GPS. Color: Black. Gender: unisex.