Inside the dome also rests the NFC antenna assembly. Perhaps this allows us to contact the Q Continuum?

The antenna comes out easily, leaving the metal part permanently attached to the inner dome.

The inner dome, a key component of the Q's spherical design, is one of the parts that we believe to have been manufactured in the USA. Word on the street is that when design changes arose, the Google engineers could quickly implement these changes by meeting with local manufacturers, as opposed to flying to foreign countries.