Hey guys, I need some help, I am going to help a friend to set up the DM, and the problem is my friend use Mac, and the internet is Wi-Fi comes from the Airport Extreme (the Shapr like mashroom head). the problem is how can I connect the DM-500S with Wi-Fi?

Here is what I think: I can buy a Airport Express, and use this Airport Express to receive the wifi,and then connect the DM to this Airport Express.

Please help me . Thank you very much.