The documentation states that they work on standard 5l party kegs.
They work on a pump system, rather than co2, but maybe a primed keg would pour without the use of the pump. I haven't used one so I can't answer definitively.
Have you thought about the Party Star Deluxe? This I have used. Nothing much to go wrong and uses co2, so your beer stays fresher longer. Not as pretty, but they don't make a noise like these Peltier based machines do - you just have to find a space in the fridge, or the space for your own fridge!
