Three-microphone array with beamforming and wind noise mitigation, Dual speakers, Media playback
power and battery life
Multiday battery life, up to 36 hours of normal use
charging
Fast-charge capable, up to 80% charge in about 1 hour
controls
Customizable Action button, Digital Crown with haptic feedback, Side button, Double tap gesture, Siri with on‑device processing
sensors
Electrical heart sensor, Third-generation optical heart sensor, Temperature sensor, Depth gauge ±1m accuracy, Water temperature sensor, Compass, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor
health and wellness
ECG app, Cycle Tracking app with retrospective ovulation estimates, Heart Rate app, High and low heart rate notifications, Irregular rhythm notifications, Medications app, Mindfulness app with state of mind tracking, Noise app, Sleep app including sleep stages, Sleep apnea notifications
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