Simple design with high-quality carbon activated filters which can handle VOCs as well as particulate matter.
Pro The right kind of "dumb" to be used with smart switches
Onboard smart features become obsolete pretty quick. Some appliances are better dumb when they serve a simple funciton and where longevity is more important. A smart switch is all the function that is really needed (turn the unit off and on). Can't adjust speed but typically you will just leave it on a preferred setting anyways.