Featuresr with oled display monitor the step count calories sleep situation and clock at any timer smart wristband with usb interface connect computer and power bank directlyr ip65 protection level waterproof under raining washing hands and taking shower can not be soaked in waterr all day activity tracking sleep monitoring silent alarmr stylish and healthy weight is 23g only wireless syncing automatically to smartphonesr adopting ultra low power consumption chip up to 15 da