If you're all line inputs this is a decent tiny battery powered mixer, but you can really only use el'cheapo mikes or mikes with a pre-amp output of some sort

So I can hear a game, and through a headset also hear movies/music - but nobody in game can hear what I'm listening too.the unit:Battery power is best to avoid hum - otherwise be prepared to isolate power cables into this small unit.

It is simple enough to use for a small gig and the battery power is a bonus.