Please upgrade your dongle firmware through OTA (over-the-air) to enjoy iOS 9 and OS X El Capitan mirroring. Moreover, after the events of Google and Apple, 802.11ac 5G and WiFi audio box become their next generation features. They are simply followers.
EZCast5G, the first 802.11ac wifi dongle in the market.
EZCast Audio, novel wifi music box makes your old speaker back to life.
Check them all in shopping.iezvu.com.
Everything you want to know about EZCast previous versions you’ll find here.