Poor design
The device is OK in general, i.e it does measure different parameters of air quality, however I cannot comment on the accuracy. The main issue for me is with the design of the device itself, which is terrible. It has a weird shape with a much larger unit that sits on a small base. The top part has the screen and some additional sensors allegedly. The unit doesn't feel stable, and it is hard to move around since it just breaks down into the two components when moved. Mine fell within the first two weeks of buying it and one of the pins that connects the top unit to the base broke, causing the screen to stop working. I had to fix it temporarily by placing a small piece of aluminium foil, which needs to be adjusted every now and then. The screen allows users to see different parameters of air quality, however navigating that is very slow, moving between parameters left and right is very laggy for this day and age. Finally it is very expensive for what it is really.