This widget lets your students mute the narration of your course while also unlocking the slide so that they may advance.
This will come in handy when you have a lot of narration but the student reads it faster.
Watch the screenr to learn more.
Play with a demo here.
Buy it for 10 bucks http://elearningenhanced.com/products/muter-and-unlocker
Links to instructions on inserting the files: