Connecting apparatus for electronic device and controlling method thereof

An electronic device connection apparatus comprising:

• a connector configured to be connected to an electronic device;
• an input device configured to generate, in response to a user input, a mode change signal, the mode change signal comprising instructions to select at least one operation mode from a plurality of operation modes,
• the plurality of operation modes comprising at least:
• a charging operation mode, and a data transmission operation mode;
• and
• a controller configured to:
• charge the electronic device according to the charging operation mode,
• communicate with the electronic device according to the data transmission operation mode,
• receive the mode change signal from the input device, and
• change between and select at least one operation mode of the plurality of operation modes in response to the mode change signal.