Connect the "pocket PM2.5 sensor" to the smartphone, you can measure the PM2.5 concentration in the air (ug / cubic meters). Measurements can be completed in about 10 seconds. Since the color of the screen changes depending on the concentration, you can understand immediately degree of contamination. Measurement results can also be e-mail in CSV or GoogleEarth (KML) file. It should be noted, can not be measured only in PM2.5 app.