Apple Watch Series 8 GPS 45mm Midnight Aluminum Case with Midnight Sport Band  A healthy leap ahead. The most advanced health features. The future of health on your wrist. Going the distance for your health. Apple Watch Series 8 features advanced health sensors and apps so you can take an ECG 1 measure heart rate and blood oxygen 2and track temperature changes3 for advanced insights into your menstrual cycle.4 And with Crash Detection sleep stages tracking and advanced workout metrics it helps you stay active healthy safe and connected. Temperature sensor3 provides retrospective ovulation estimates and advanced cycle tracking features4 Measure your blood oxygen with a powerful sensor and app2 Take an ECG anytime anywhere1 Get high and low heart rate and irregular rhythm notifications1 Advanced safety features including Fall Detection Emergency SOS 5 and Crash Detection Enhanced Workout app with more advanced metrics and ways to train A completely redesigned Compass app with waypoints and Backtrack Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone The most crack-resistant front crystal yet on an Apple Watch IP6X dust resistance and swimproof design 6 and increased durability for fitness and activity Call text and email with just a few taps Listen to your favorite music podcasts and audiobooks (for use with GPS models) Make purchases instantly and securely from your wrist with Apple Pay7 Large Always-On edge-to-edge display All-day battery life and fast charging8 Sleep stages tracking lets you see how much time you spend in REM core and deep sleep watchOS 9 features an enhanced Workout app a new Medications app sleep stages and greater insights into heart health Apple Watch comes with 3 free months of Apple Fitness+ featuring 11 different workout types from HIIT to Yoga and even meditations9 Apple Watch Series 8 requires an iPhone 8 or later with iOS 16 or later.  Brand: Apple Model: MNUL3LL/A Manufacturer: Apple