| 摘要 |
An operating method of a repeater comprises the steps of: the repeater, connected to a display device, receiving a first wireless signal corresponding to a first dot code sensed by a dot code reader which senses the first dot code printed on a printing medium; and the repeater transmitting first data corresponding to an alphabet to the display device such that the alphabet corresponding to the first wireless signal is displayed on a first graphical user interface (GUI) displayed on the display device and a first key corresponding to the alphabet is displayed on a virtual keyboard displayed on the display device. |
