If your electrical plug is a standard flat plug so you do not have to bring anything, if it is needed to bring the round socket adapter.

如果你的电器插头是标准的扁形插头那么你什么都不用带，如果是圆形的就需要带转接插座。

youdao

If an adapter extension plug is used, care must be taken to ensure that the terminals on the adapter plug are in the correct position for the particular application.

如果使用了附加的延长插头，须注意保证附加插头上的接线端在正确位置，以备特殊用处。

youdao

The phone service will only be available to AOL members, who will need to plug a telephone adapter into an existing broadband connection to make calls.

FORBES: Internet Phone Calls Not Just For Geeks

Customers have to plug their phones into an adapter, which then connects to a broadband Internet connection.

FORBES: EarthLink To Bundle Services

Users connect the adapter via an Ethernet cable to a router, and then plug the adapter into a wall socket.

ENGADGET: Cisco unveils Linksys HomePlug AV Powerline solutions, converts outlets into network connection points