Use your iPhone as a Microphone.
You can even wirelessly connect your iphone to a bluetooth receiver.(bluetooth speaker will supported by later upgrade version).
It include a great Reverb Sound Effect tuner.
How to use it as a wireless mic :
1.Go to Settings->General->Bluetooth-> Turn on the Bluetooth switch.
2.Connect your iphone to the bluetooth receiver (bluetooth speaker or airplay device supported by next version).
3.Open Wireless MIc app , speak into the mic of your iPhone.
thats it.
You can also use Audio Line connect it to a AMP System or multimedia speaker.
Support Email: [email protected]