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Miracle "microphone" converts any surface into a multi-touch surface
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![Miracle "microphone" converts any surface into a multi-touch surface](https://tech.firstpost.com/wp-content/uploads/gallery/2012/jan/microphone_final_051558407115_640x360.jpg?im=Resize,width=720,aspect=fit,type=normal "Miracle "microphone" converts any surface into a multi-touch surface")