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Features: Model: BSW203 Timekeeping,Day&Date Invisible: OLED Hands Calibrated via APP OLED Light up against wrist raise Pedometer and Activity Tracker 24-Hour HR Detecting Graphic Activities Record Sleeping Tracking ,Sedentaty Reminder Scheduled Vibration Alarm Calorie Burn Detecting Selfie Via BLE4.0 Notification of incoming message Lithium-Ion Battery 130mAh/3.7V Battery Life: 30 days for timekeeping including 10 days for smart mode Rechargeable Battery with Magnetic Interface Water resistant : 3ATM