[He doesn't skip a beat, but he takes note that she's from a world where microphones don't exist. Probably from a world with a lower level of technology than he's used to.]

They're pieces of technology that record sound and store it elsewhere for someone to listen to. Cameras are the same, but with visual information. In short, everything you do and say is saved and watched by Capitol security in a remote location to keep track of what you do.

[He's just going to put the bottle of wine on the table for her. He has a feeling that she's going to want more.]