Very cool Osage. I wish I could have one in my cockpit...I'm sure it will be way out of my aviation budget for some time though. Has your buddy gotten it approved by the FAA yet?
One suggestion on the design...it would be much more convenient if the product was integrated into a headset/mic so that a pilot does not have to wear two headgear items. Or better yet, see if a generic method can be developed of attaching it to an existing headset.
Best of luck to your friend.