My pro is an app that can control designated devices through Bluetooth connection (ble) on Apple mobile phone, so as to achieve the effect of playing music and karaoke.
IOS Device UI demo video URL：
http://www.eduo-audio.com/uploads/cz01.mp4
Demonstration video website of operating and connecting machines and equipment ：
http://www.eduo-audio.com/uploads/video77.mp4