Classic Design: Light and thin aluminum body, classic navigation crown, and HD AMOLED displayBioTracker PPG 3.0 Biometric Sensor: Monitor blood-oxygen, heart rate, stress levels and sleep, and PAI health assessment systemFitness Partner: 150+ built-in sports modes and 5 satellite navigation systemsVibrant Watch Faces and Always-On Display: More than 100 stylish watch faces and 15 animated watch facesAll Day Heart Rate Monitoring: Monitor heart rate even while swimming and receive alerts for abnormally high or low heart ratesMonitor Sleep and Breathing Quality: Monitor sleep stages and daytime naps, track breathing quality at night, and receive suggestions for sleep habit improvementsFemale Cycle Tracking: Receive reminders, record menstraul cycles, and get predictions for upcoming menstrual and fertile periodsStress Level Monitoring and Measurement: Monitor stress levels all day, get alerts for abnormally high stress levels, perform a manual stress level test, and prompts to open the watch's breathing exercise if high stress detected