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. Advanced metrics in the Workout app, including Heart Rate Zones and Running Form. Alpine Loop band is extremely rugged and secure to meet the needs of hikers and climbers. Advanced health sensors give you deep insights into your health. Hold the Action button to activate a siren that can be heard up to 600 feet away. With access to tens of thousands of apps on the App Store right on your wrist, Apple Watch is the perfect personal device for whatever you love to do.