Display - Always-On Retina display, Up to 2000 nits, Wide-angle OLED, LTPO3 ECG app, High and low heart rate notifications, Irregular rhythm notifications, Low cardio fitness notifications, Blood Oxygen app. Sleep tracker - Sleep Tracking, Sleep apnea notifications , Sleep score, S10 chip, Wrist flick gesture, Double tap gesture, Precision Finding for iPhone Vitals app featuring heart rate, respiratory rate, wrist temperature, blood oxygen, and sleep duration, Temperature sensing, Cycle tracking with retrospective ovulation estimates. Water resistant 50m, Swim, snorkel, Depth gauge to 6m, Water temperature sensor. GPS, Cellular options, 5G capable, Fast-charge capable (0–80% in about 30 minutes; 15 minutes for up to 8 hours)