Display: Always-On Retina LTPO OLED display (45mm: 396 x 484 pixels, 1143 sq. mm display area; 41mm: 352 x 430 pixels, 904 sq mm display area). Case Material: Aluminium or Stainless Steel. Size: 45mm or 41mm. Health Features: Electrical heart sensor (ECG app). Third-generation optical heart sensor. Blood oxygen sensor (Blood Oxygen app). High and low heart rate notifications. Irregular rhythm notifications. Low cardio fitness notifications. Temperature sensing* Cycle Tracking with retrospective ovulation estimates. Supports Family Setup (GPS + Cellular models only). Up to 18 hours battery life. Up to 36 hours in Low Power Mode. Fast charging
* Display: Always-On Retina LTPO OLED display (45mm: 396 x 484 pixels, 1143 sq. mm display area; 41mm: 352 x 430 pixels, 904 sq mm display area)
* Brightness: Up to 1000 nits
* Case Material: Aluminium or Stainless Steel
* Size: 45mm or 41mm
* Health Features:
* Electrical heart sensor (ECG app) [3]
* Third-generation optical heart sensor
* Blood oxygen sensor (Blood Oxygen app) [2]
* High and low heart rate notifications
* Irregular rhythm notifications [2]
* Low cardio fitness notifications
* Temperature sensing [5] (availability may vary by region)
* Cycle Tracking with retrospective ovulation estimates [6]
* Emergency SOS [4]
* International emergency calling [14]
* Fall Detection and Crash Detection
* Other Features:
* GPS, GLONASS, Galileo, QZSS, and BeiDou
* Compass
* Always-on altimeter
* Water resistant up to 50 meters [1]
* Accelerometer (up to 32 g-forces with fall detection)
* Gyroscope
* Ambient light sensor
* Speaker
* Microphone
* Apple Pay
* GymKit
* Capacity: 32GB
* Ceramic and sapphire crystal back (depending on model)
* Available cellular connectivity [7]
* Supports Family Setup (GPS + Cellular models only) [8]
* Up to 18 hours battery life [18]
* Up to 36 hours in Low Power Mode [18]
* Fast charging
Your Apple Watch series 9 comes with 1 year of hardware repair coverage through its limited warranty and up to 90 days of complimentary technical support.