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Full Coverage Of Indoor And Outdoor Sports Rekindling The Weight Loss On The Wrist.  24-Hour Intelligent Heart Rate Monitoring Understands Every Anomaly And Discomfort. Comprehensive Upgrade To Algorithm And Hardware Which Enables Irregular Movements Such As Trail Running, Mountain Climbing, And Hiking To Monitor Accuracy Up To 50%, It Can Also Vibrate When Your Heart Rate Is Abnormal. Three Health Modes With Mi Fit App.