GPS

Optical heart sensor

Digital Crown

S3 with dual-core processor

Accelerometer and gyroscope

Swimproof²

watchOS 5

Aluminum case

Low and high heart rate notifications. Emergency SOS. New Breathe watch faces. Automatic workout detection. New yoga and hiking workouts. Advanced features for runners like cadence and pace alerts. New head-to-head competitions. Activity sharing with friends. Personalized coaching. Monthly challenges and achievement awards. You can use Walkie-Talkie, make phone calls, and send messages. Listen to Apple Music¹ and Apple Podcasts. And use Siri in all-new ways. Apple Watch Series 3 lets you do it all right from your wrist.

Bought it as a christmas gift, but my girlfriend wants the series 4. Lost the reciept, brand new never opened trying to make a little bit back from my stupid mistake