Fundamentally redesigned and re-engineered, the largest Apple Watch display yet features a built-in electrical heart sensor and a new Digital Crown with haptic feedback. It includes low and high heart rate notifications, fall detection, and emergency SOS. Enjoy new Breathe watch faces, automatic workout detection, and new yoga and hiking workouts. Advanced features for runners include cadence and pace alerts, head-to-head competitions, activity sharing with friends, personalized coaching, monthly challenges, and achievement awards. Built-in cellular connectivity allows you to use Walkie-Talkie, make phone calls, and send messages. Stream Apple Music and Apple Podcasts, and use Siri in all-new ways—even while you’re away from your phone. With Apple Watch Series 4, you can do it all with just your watch.