text: what is a "d-link airplus dwl-g520 wireless pci adapter rev.b? i have this installed in the back of my computer.   it has a little antenna on it.  what does it do?  is it possibly for obtaining a internet signal from an isp or something outside my house or a satellite?  or is it just some dumb thing for picking up a signal from some kind of wireless router inside my house? your latter question is the correct answer. it is infact the wireless card to connect to your wireless router which in turn allows you to access the internet access without a cat5e/6 cable.