Rugged and capable, built to meet the demands of endurance athletes, outdoor adventurers, and water sports enthusiasts — with a specialized band for each. Up to 36 hours of battery life, plus all the Apple Watch features that help you stay healthy, safe, and connected. 49mm corrosion-resistant titanium case. Larger Digital Crown and more accessible buttons. 100m water resistance. Customizable Action button for instant physical control over a variety of functions.