Key Features: Faster dual-core processorSeries 3 is the fastest Apple Watch everDual-core processor delivers up to 70% faster performance, faster app launch times, and an overall smoother user interfaceFaster processing power means Siri can speak using the built-in speakerW2 wireless chipDelivers up to 85% faster Wi-Fi and is up to 50% more power efficientBarometric altimeterMeasures elevation gain for outdoor workouts, such as running, hiking, skiing, and snowboardingGet more Move and Exercise credit for moving uphillTrack how many flights of stairs you climb during the dayGPSRecord distance, pace, and speed with built-in GPSGet precise metrics for outdoor workouts such as walking, running, cycling, or an open water swim- without needing to take your iPhoneSwim proofSwim proof (water resistant to 50M), so you can leave it on when you’re in the pool or the oceanPool swim workouts now automatically track sets when you take a rest, measuring pace for each set and distance for each stroke typewatchOS 4The Siri watch face intelligently updates throughout the day, showing what you need when you need itSmart activity coaching helps you close your rings every dayThe Workout app makes it easier to do multiple workouts in one session, and there’s also a new workout type-High Intensity Interval Training (HIIT)The updated Heart Rate app shows additional insights-while you’re resting, walking, or in the recovery phase after a workoutThe Music app has a new UI and automatically syncs curated playlists to Apple Watch (Apple Music requires a subscription).Apple Watch bandsPersonalize your Apple Watch with additional bands available in a range of colors, styles, and materialsThe new Sport Loop is lightweight, adjusts comfortably around your wrist, and provides soft cushioning while allowing for moisture to escape during exercise-making it great for an active lifestyle