This is an AC (the newest standard) WiFi, dual-band, USB add-on. It is designed specifically for Macintosh, and works with OS/s 10.4-10.9. The kit is complete and comes with the AC Quicky device, the manual, a USB cradle/extension cord, installation software on CD, and installation software on SD memory card (for disk-less new Mac's). The kit manifest also says there are antennas, but unless it's referring to the built-in flip-up one, I'm not sure what they mean. This retails for $100. It's yours, brand new and unused for $47 including first class insured USPS shipping within the continental USA. I will ship elsewhere for the added price difference.
Here's a link to the company webpage:
Like my other sales here, this one is up for a limited time on AppleFritter and then I move it on to Ebay for a higher price. This sale is good for a little more than one week from today and expires at the end of day June 29, 2014. BTW it seems to be a win-win strategy. I sell about 3/4 of the items here with less hassle, and the rest sell well on Ebay even at the higher rates.