Up to 20 days of battery life (If Automatic Heart Rate feature is turned on then expected battery life will be 3-9 days). Compatible with Android 4.4 or later/iOS 9.0 or later
Use Mi-Fit App to connect the phone. Connectivity – Bluetooth 4.2
0.78” OLED touch screen. The adjustable strap length is 155 – 216mm

Mi Band 3 (Black)

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