Retina LTPO3 display, 42mm: 374 x 446 pixels, 46mm: 416 x 496 pixels, 1,000 to 2,000 nits brightness.

Health features: ECG, heart rate monitoring, sleep stages, menstrual cycle tracking, fall detection, crash detection.

Up to 18 hours of battery life, 36 hours in Low Power Mode.

Supports LTE, GPS, NFC (Apple Pay), emergency SOS, and a range of accessibility features.