| 摘要 |
Embodiments of the present invention relate to a device includes both a transferring and receiving interface. The device may include a direction indicator, for example an arrow, indicating a direction of data transfer. The device may also include a switch, such as a button, to initiate data transfer. The device may also include a counter, display, or light that indicates the amount data transferred and serves as a user interface. The device may also include a power source, such as a battery, to power the device during data transfer.
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