1)GPS model lets you take calls and reply to texts from your wrist

2)Large Retina OLED display

3)Up to 2x faster processor than Series 3

4)Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone

5)Measure workouts like running, walking, cycling, yoga, swimming, and dance

6OSwimproof design

7)High and low heart rate notifications and irregular heart rhythm notification

8)Sync your favorite music, podcasts, and audiobooks

9)Pay instantly and securely from your wrist with Apple Pay

10)Built-in compass and real-time elevation readings

11)Can detect if you’ve taken a hard fall, then automatically call emergency services for you

12)Emergency SOS lets you get help from your wrist

13)watchOS 7 with sleep tracking, cycling directions, updates to Siri, and new customizable watch faces