Great filter.. but I got it.. the manual has no setup instructions... nothing on the box... so I plugged it in and run it.. first thing I noticed is a Wifi symbol on the display and the fan wobbling.... some reviews below said their wobbled and sent it back. After running it for a day and rather weak performance, turns out you have to open the front and remove the plastic the filter is wrapped in...so no air made it through the filter and that caused it to wobble. I suggest you put that information somewhere, anywhere. How is one supposed to know that the filter is installed but with plastic wrapped around. Still no idea what the wifi symbol means on the display?