Always-On Retina LTPO3 OLED, wide-angle, up to 2000 nits, Ion-X glass (2× more scratch-resistant Up to 24 hours normal use; up to 38 hours in Low Power Mode; fast charging (≈15 min for up to 8 hours of use) Electrical heart sensor, 3rd-gen optical heart rate, blood oxygen, skin temperature, compass, always-on altimeter, Hypertension notifications, Sleep Score, ECG, sleep apnea detection, high/low heart rate & irregular rhythm notifications, Vitals app