Key Features Large Always-On OLED Retina Display Up to 18 Hours of Battery Life Fast Charging via USB Type-C Auto Bike Riding Tracking Blood Oxygen Sensor Take ECG Readings in Just 30 Seconds Heart Rate Monitor & Sleep Tracking Audio- & Video-Guided Meditations Dust Resistant & Swimproof to 164' QWERTY Keyboard & Scribble Texting Wireless service plan required for cellular service. Contact your service provider for more details. Apple Watch Series 7 requires an iPhone 6s or later with iOS 15 or later.