Mine has two, the built in one (802.11b,g) and a faster one (802.11b,g,n) that I bought a few months ago on eBay. I downloaded all four of those DR discs in about 8 hours with it (via my neighbor's "n" router). 10.6GB in that time with a two bar signal isn't bad. That little adaptor cost me only $15, and it's well worth it.