| 摘要 |
PROBLEM TO BE SOLVED: To provide a new power supply method for an apparatus that is used by attaching it to a mobile terminal, and to further provide a connection device and the like that are configured to allow the mobile terminal to reproduce content such as music by attaching the connection device to the mobile terminal.SOLUTION: A connection device is detachably connected to a mobile terminal having a communication function and has stored its specific identification information. The connection device comprises a plug terminal for connecting to an earphone jack of the mobile terminal. The plug terminal is configured to obtain power from a voice output channel included in the earphone jack and to output the identification information via a microphone channel included in the earphone jack. |
