If anyone chooses between models 2, 2S and PRO - I advise this one, if not for a large PRO room, but between 2 and 2S the differences are in favor of 2S: + screen, laser sensor. According to the differences, I was told that the size is smaller (lower) than 2S. This is strange, because filters are suitable for all models, which means that the dimensions, at least the internal ones, should not differ.
The filter is blue (blue), I'll try to buy and put purple, antibacterial - let's see the differeSee full review