I have two eflows (trios, whatever). One of them has a video screen thingy, but I don't think it has an adjustable particle size. It doesn't allow you the option of disconnecting the long hose and putting the cup right in the disk, though, and my other eflow (the less fancy one) has that option. So they are oddly different, even though I guess they do the same delivery. The screen is useless -- all it does is show a little picture of steam coming out of the neb cup during the treatment and then flash a thumbs up when the thing beeps to show the med is done. Seriously. That's ALL it does.
In case anyone wonders, I have two b/c I got one through the AzLi EAP (the video screen one, and it is only supposed to be used with the study drug) and the second came free with my script for TOBI through Foundation Care. So it's not like I'm hording them or something!