It's a COMP. Basically it's a portable computer whose main purpose is the subjugation and countering of demons, but you get some extra bells and whistles attached to it, depending on the manufacturer.

[He doesn't really care if she believes him or not - in the modern age, humans were increasingly resistant to acknowledging the supernatural and he learned cold, harsh experience swayed them faster than any verbal argument. He only cares that she, too, apparently has one too. Nothing more dangerous than a complete novice armed with a COMP...]

If you have one too, I'd be careful. Then again, if there are demons out there, it'd be the only thing between you and an early death so... do what you will with that info.

[He rests his COMP back on his lap.]

Say, what's your name, miss? You got one?