Each of these masks have a space for a smart phone. You download an app called Digital Dudz you can either use the animation from Digital dudz t-shirts or the Digital Dudz Masks.

You can choose from a fish swimming past your head, moving eyeball, scanning cyborg eye, pulsing zombie brains.

These are so effective. The masks are made by Ghoulish productions the quality and detail in these masks are fabulous. People buy these as collectables not just for costume parties.