Apple Watch Series 7 (GPS, 45mm) Smartwatch with aluminum case with (PRODUCT)RED Sport Strap Regular Fitness tracker, O₂ Levels app, water resistant   With the GPS model you answer calls and messages from the watch Always-on Retina display is nearly 20% larger than Series 6 models, making everything easier to see and use The strongest front crystal an Apple Watch has ever had, IP6X-rated dust resistance and swim-proof design Measure blood oxygen with a state-of-the-art sensor and app Take an ECG when you want, where you want Notifications in case of too high or too low heart rate, or irregular rhythm New Tai Chi and Pilates workouts, plus tons more including Running, Yoga, Swimming and Dancing With Apple Watch you measure how much you move every day and check your progress in the Fitness app on iPhone Sync music, podcasts and audiobooks Apple Watch Series 7 requires iPhone 6s or later with iOS 15 or later