I seriously doubt that "802.11 b/g/n (wi-fi)" is a valid model number. Open Device Manager, find the device and click on it. Click on the properties tab and give me the "Hardware ID string". Or if this device came pre-installed in your computer, please provide the computer brand and model.
Also, tell us what the interface is (eg: how does it connect to your pc?), eg; Mini board for use in a laptop, pci card that plugs into a pci slot, external USB, other?