Xiaomi Mi Band 1S Heart Rate Monitor Smart Miband 2 Wristband Bracelet Fitness Wearable Tracker Smartband Black Color US ADI sensors to detect movement and sleep quality Light-sensitive version of the real-time monitoring of heart rate, sports science Monitor your activity levels, track walking distance and calculate calories burned. Achieve the daily exercise targets you set and work towards a healthier lifestyle! Monitoring of heart rate Real-time monitoring and recording, scientific planning exercise Automatic sleep monitoring analyzes your sleep quality. Sync with the app to analyze your fitness and sleep activities to help you improve your lifestyle.