Mi band 4
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- 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.
Tags: mi,mi band, watch, watches, smart watch, xiaomi smart watch,xiaomi smart band