Mi Smart Band 4 Step up, live more Full colour display and heart rate monitor 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.
Price : $34.97
Brand : Xiaomi
