http://www.therealtonystark.com
This is a custom-built version of Cyclops' visor from X-Men 2. It permits the user to see through the lens while still illuminating it during a "blast". A rotational knob on the right-hand side of the unit allows the user to change the colour of the blast by rotating, and then fire that blast by pushing the knob in.
The entire unit is 3D modeled from scratch, 3D printed, and then powered by a 3.7V lithium polymer battery. There is space to contain a small speaker, but the addition of the colour-selection functionality prevented me from adding audio to this version.