Fun: USB air quality analyzer

This cute little product shaped like a bud is not a toy. It has an important function: analyzing the air quality in your home. This analyzer uses different color codes to indicate the current air quality inside.

When the two leaves of the analyzer turn blue, it means that the air quality in your home is quite good. However, if the color changes to pink, it indicates that you need to take some actions to improve the indoor air quality, such as opening the windows or turning on the ventilation fan.