stared as described above is carried out via a ui provided by the portable device 10 accordingly while the portable device 10 is seated on the stand device 20 and is charged with power the user can search a desired web site for desired media data such as music receive the media data and play the media data or store the media data and play the stored media data at the desired time in another embodiment of the present invention the protocol stack of the portable device may be constructed as shown in fig3 c in this embodiment while the portable device 10 u2032 is seated on the stand device 20 or 20 u2032 the operation described with reference to fig3 a or 3 b can be performed along a path si via the tcp ip unit in the same manner a path s 2 along which the application layer directly transmits and received data to and from the usb unit is used to connect to another device such as a pc and transmit and receive data accordingly the user may directly connect the portable device 10 u2032 to a pc and download a media file or the like stored in the pc to the portable device 10 u2032 along the connection path s 2 or acquire media data from the network 30 via.