Check with the manufacturer: http://www.buy.com/listing/sellersummary.asp?sellerID=15743316&sku=208905812&buy=0&c=1

This is only a USB Adapter for Nintendo DS Lite / PSP / Wii / PS3 not PC.

No.

If you already have an internet connection, you dont need any device, just plug this into a USB port of a PC connected to the internet and you already have a wireless internet connection for your game consoles.

you can only use this item in an area that has wifi connectivity