Featuring a compact design, AirPort Express supports simultaneous dual-band 802.11n Wi-Fi. Set up your wireless network quickly and easily using your iPhone, iPad, iPod touch or PC. Create a network just for guests. Stream music to any room in the house. And print from any room in the house too. All with fast wireless technology. Slightly bigger than a cd case. You'll never have to worry about lost cables. It connects to your macbook pro with retina display, macbook air, imac or mac mini with a single USB cable that is built into the superdrive. No separate power adaptor, and it works whether plugged in or running on battery power. USB 2.0 compatibility.