Romother capacity mah85 materialmetal tpu sim card typeno sim card slot connectivitybluetooth40 bluetooth30 fitness wellnessthree time zones alarm clock sleep tracker activity tracker cpunrf51822 ramother typesmart bracelet featuresdistance tracking pedometers calories burned video anti lost message control information touch screen sports exercise record modelm6 mini sensorfinger sensor gravity sensor supported operation systemandroid ios screen typedisplay techno