Function: 1. 24-hour continuous heart rate monitoring 2. ECG Measuring Function3. Blood Oxygen Measurement4. HRV Monitoring and Analysis5. Sports Monitoring and Fitness Suggestions (Walking, Calorie, Mileage)6. Precise Sleep Monitoring7. Measurement of exercise blood pressure8. Exercise mode9. Alarm clock reminder 10. Call and SMS, information reminder 11. Telephoto12. Countdown, Stopwatch Function14. Call Reminder, Silence, Rejection15....