This device can measure PM 2.5 and 10 fine dust particles, as well as temperature and humidity levels in real time. If readings indicate poor air quality levels, an indicator light and a message delivered via an app alert users and then automatically set the air purifier in motion. The small, compact monitoring device can be powered with batteries and comes equipped with shoulder straps. This makes it easy for users to carry with them and take air-quality readings wherever they may be. The generous LCD display allows for good legibility even from a distance.