Classic Premium Design: Ultra HD AMOLED display, classic navigation crown and light and thin aluminum bodyBioTracker PPG 3.0 Biometric Sensor: Monitoring of blood-oxygen, heart rate, stress levels and sleepA Next-Level Fitness Partner: 150+ built-in sports modes, smart recognition of 8 sports, and 5 satellite navigation systemsLive the Hands-Free Lifestyle: Alexa built-in and offline voice assistant, music storage and playback, and bluetooth phone calls12 Day Battery LifeVibrant Watch Faces and Always-On Display: More than 150 stylish watch faces and 15 animated watch facesMonitor Heart Rate All Day and While Swimming: Receive alerts for abnormally high or low heart rates, as well as tracking heart rate zones to optimize workoutsIn-Depth Monitoring of Sleep and Sleep Breathing Quality: Monitor sleep, daytime naps, track sleep breathing quality, and suggestios for sleep habit improvements