WTS Spare Blizzard Authenticator

[Calneon]

You don't need any form of internet connection for the authenticator. Not sure how it works exactly, but you just push the button and insert the code it generates.

Also, by activating the authenticator, you get a free in-game Core Hound Pup pet.

But how does the game know what code the authenticator has generated? It needs some way to talk with the game, does it plug in to a USB slot?