GPS + Cellular model lets you call, text, and get directions without your phone1Large Retina OLED displayUp to 2x faster processor than Series 3Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhoneMeasure workouts like running, walking, cycling, yoga, swimming, and danceSwimproof design2High and low heart rate notifications and irregular heart rhythm notification3Sync and stream music, podcasts, and audiobooks4Pay instantly and securely from your wrist with Apple PayBuilt-in compass and real-time elevation readingsCan detect if you’ve taken a hard fall, then automatically call emergency services for youEmergency SOS lets you get help from your wrist3watchOS 7 with sleep tracking, cycling directions, updates to Siri, and new customizable watch faces100% recycled aluminum cases available in three finishes