Full colour AMOLED touch display View call, text, and app notifications Activity and swim tracking Water resistant up to 50m*； 3-axis accelerometer, 3-axis gyroscope Up to 20 days battery* A single charge lasts up to 20 days.
Instantly view call, text, app notifications and music in play. Keep your hands free as you keep up with life.
Running Tracks your pace and step count Maintain a safe workout, whether you're running short or long distance.
Swimming 5 ATM water resistant up to 50m Recognizes 5 different swim styles Records 12 data sets including swimming pace and stroke count
Sleep monitoring Accurately tracks light and deep sleep as well as heart rate during sleep to help you adjust your sleep patterns.
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The application Xiaomi Mi Smart Band 4 provides you with many information.
So welcome to the guide application Xiaomi Mi Smart Band 4

Disclaimer:
This application is unofficial and was created by a group of fans of this product and the purpose of the application is to guide people on how to use the product correctly