AirPlay lets you wirelessly stream what’s on your Mac or iOS device to your TV or speakers.
You can do it via a Apple TV or a AirPort Express unit. Or you can mirror exactly what’s on your Mac display to a big screen or TV.
Today you can also buy speakers and sound system with AirPlay integrated, Or you can easy set up your system one by using a AirPort Express unit.
The AirPlay feature is very easy to use. If you are connected to a wifi network that have a AirPlay unit up and runing, it will automatically appear on your iOS device or Mac when you are plaing music, video, podcast or viewing photos.
All you have to do is click the AirPlay icon and choose the AirPlay unit you will use.