- GPS model lets you take calls and reply to texts from your wrist
- Retina LTPO OLED display
- S5 SiP with 64-bit dual-core processor
- Up to 2x faster processor than Series 3
- Optical heart sensor
- Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone
- Measure workouts like running, walking, cycling, yoga, swimming, and dance
- Swimproof design
- High and low heart rate notifications and irregular heart rhythm notification
- Sync your favorite music, podcasts, and audiobooks
- Pay instantly and securely from your wrist with Apple Pay
- Built-in rechargeable lithium-ion battery