It is generally a wireless USB electronic device that provides internet connection installation. It can provide internet connectivity by attaching to wireless internet networks. The greatest advantage is of portability. Such a electronic device can be connected to laptops by mobile users and can be used easily. And such a USB can be switched easily between laptops and desktops too.

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The first intention of the Wi-Fi design was to do and be used for many mobile devices and Local Area Networks but today it is used popularly to give access to the internet. It would help the user with a wireless computer or Personal Digital Assistant that is a PDA, to get run to the internet with an working point in the closeness.