Both the built-in control screen and the app show the real-time levels of airborne particulates in three size classes (1, 2.5, and 10 microns, roughly corresponding to smoke, dust, and pollen)
Common regulatory measures in these countries include: Age Restrictions: Virtually all countries allowing sales have minimum age limits for purchase, typically 18 or 21 years
It depends on usage and environment
On average, smokers tend to live 13 to 14 years less than their non-smoking counterparts
Weinreb MD, a distinguished Professor of Ophthalmology at the University of California San Diego, claims that even a healthy persons eyes can be bothered when it comes to smoke exposure and, particularly in the case of those with dry eye syndrome, exacerbate symptoms. What causes this irritation is the existence of small particles, which are two and one half microns or less in size (for reference: 25,400 microns = 1 inch), within the smoke that get stuck in your eyes