Apple Watch Series 2 is a superior sports watch that measures your workouts with detailed, customizable metrics. An advanced activity tracker that shows you how often you move, exercise, and stand, and lets you share your progress. A powerful health tool that helps you be more conscious of your overall well-being, starting with your heart rate. And an all-day assistant that provides instant access to the people, apps, and information you care about most. There are cases made from aluminum and stainless steel and a full range of interchangeable bands in a variety of styles, colors, and materials. All Apple Watch Series 2 models run watchOS 3. Requires an iPhone 5 or later.