Model No: Mi Band 4
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.
Health monitoring – 24/7 heart rate monitoring and sleep tracking.
Mi Fit app – Records your health data to help you get the most out of life.