MI Smart Wristband is to tracking user data non-stop and to auto-sync such data with smartphone(s) via BLE. Moreover, it vibrates when muted alarms and incoming calls are present. Being removable and water-proof, the light-weighed 5 g capsule-shaped device could be embedded into an assortment of cases to fit multiple scenarios. To indicate current battery / charging status and activity progress, LED lights flash different colors visible through micro-holes laser-drilled into an aluminum cover. Its phone-app displays real-time and historical data, with settings and remaining battery life (over 30 days under full charge) available as well.