It’s rather amusing to see Reid go from that very professional demeanour he’s had so far to such wide-eyed enthusiasm, and Jack smirks.
“Far too complicated to explain,” he says, but flips it open anyway to give Reid a look. Then he remembers who he’s talking to and amends, “Doesn’t do a lot any more anyway, not here. But when it does work, you work the settings using these buttons here.”