It displays the current cleanliness (pollution) level of the room.

Clean:Blue Lightly polluted:

Polluted:

Highly

Light purple

Dark purple

polluted : Red

The cleanliness (pollution) level of the room is determined by the color at the end of the penetrating hole.

How to Use OPERATION/INDICATION PART

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Coway AP-1008CH, AP-1008BH warranty Polluted Highly Light purple Dark purple, CleanBlue Lightly polluted