Phone?

[He looks a little confused before recalling the advancements in cell phones while he's been tucked away in Saint Clair's.]

Ah, yes, I suppose it could be a sort of phone. Perhaps like one of those... Eye-phones. It seems to have a video function as well as a written messaging system in addition to the usual long-distance audio.

[Walter tucks away his twizzlers since she clearly doesn't want any, now focused on trying to take apart his SFC.]