Airthings monitors indicate good/fair and bad air quality with a light color.

GREEN: All sensors indicate good air quality 😀

YELLOW: One or more sensors indicate fair air quality 😐

RED: One or more sensors indicate poor air quality 😣

Temperature, light, and noise sensors do not affect the color of the light.

Simply move your hand in front of the device, or tap for Wave Enhance, and the monitor will light up with the corresponding color.

You can review the recommended thresholds for each sensor here.