You can live without food for a month, without water for a week and without air for five minutes. We spend around 90 percent of our time indoors, exposing ourselves to various airborne pollutants, so needless to say - It is important to be aware of the air we breathe. The JACOB JENSEN Air Quality Monitor is a user-friendly product that measures and displays indoor air quality, humidity and temperature, providing you with an essential overview of the indoor climate in your home.