AirQ Check is manufactured in Taiwan using the latest MEMS semiconductor technology. It features a stylish zinc alloy casing and ergonomic sliding cover. When not in use, it can be carried wherever you go. Plug it into the mobile phone to connect to the specially designed app to see if the levels of TVOC (a combination of different gases including Formaldehyde, Acetaldehyde, Alcohol, and Carbon Dioxide) and Carbon Dioxide exceed the recommended limits. It can also detect the temperature and humidity as well. The LED indicator light on the device also changes if harmful gases are detected. Green means good, orange means moderate and red means hazardous. The app will also beep if the concentration of gases is too high to help the consumer determine the current air quality. The AirQ Check is light, portable, convenient and easy to use. Anyone can use it to keep an eye on the air quality!