4 AirPlay 2
First debuted at WWDC ’17, AirPlay 2 has been included in a handful of iOS 11 beta versions. But, thus far, it hasn’t made it to a final release. That could change this time around since AirPlay 2 functionality is back in the first iOS 11.4 beta.
The upgrade adds a couple of new features to the wireless streaming platform, including support for multi-room audio — basically, you’ll be able to connect your iPhone or iPad to multiple audios devices. You’ll also be able to control volume on those audio devices right from the Control Center.