this is the model after the one with the dongle, It works on 211, 311, 411 , gen2, and region controllers with gcs. so far we have had one unit fail, the display just went dim and that was that, the other units are working fine, however i know of another company that has bought quite a few of these units, and they have had a couple of them fail as well. but for the price you can't go wrong.

if rolly says the dongle is trash, do not use it, you should be able to use the tool without the dongle, and be fine on the 211, 311,411 i think the dongle was supposed to be for the GCS units, a friend of mine tried the dongle on a gcs, and it did not work, luckily it did no damage as rolly says, but maybe he just got lucky.

I have had one report from a board repair facility that indicated that plugging in the newer unit took out a number of RS boards in the system, not sure about this, but since he told me that, i have been leary of plugging the unit in, thats why i take it to a 211 first to give it a try. I did notice that when you first plug the unit into a 211, it takes about 45 seconds for it to start working, the menu items come up, but you can't select them. just wait the minute or so, then it is ok, after that when you plug it in, it works right away, really strange.