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Specification: *Main Chip: Nordic NRF51822 *Gravity Sensor: 3D sensor *Display: 1.3" OLED, tempered glass *Button: Touch button *Battery: Polymer Lithium 150 MAH *Standby: about 15 days *Normal Use: about 7 days *Frequently use: about 2 days *Material: belt( Silica Gel), Case(Zinc Alloy) *Waterproof Grade: IP67 *Storage temperature: -20℃-70℃ *Bluetooth Version: BLE4.0 *App Name: Dafit *System support: IOS 8.0 or above, Android 4.3 or above Functions: *Heart Rate Monitor(Automatically monitor and record data throughout the day) *Blood pressure monitor(Record blood pressure history data) *Vibration reminder(Message, QQ, Skype, Whatsapp, Twitter, Incoming Calls reminder, Facebook) *Incoming calls reminder with number display *Task Alert *Lift the wrist to bright screen *Additional features: Steps counter, Time, Pedometer, Calorie burning monitor, Walking Distance Tracker, Sport time, Sleeping monitor. Package Included: 1* Fitness Tracker 1* Charging Cable 1* User manual