In Automatic Mode, the RGB light flashing and purification speed changing when PM2.5 critical value ±1. To prevent this situation, the protection value range set for ±5. When PM2.5 increases, value +5, vice versa -5. But the real-time indicator shows color following the real PM2.5 index for a more intuitive display.
When you set the index range of the lightly polluted environment to 0~34, when the PM2.5 value is between 0-38, the indicator light will not change. When it reaches 39, the indicator light will switch to green. In the same way, the indicator light will turn back to blue when the PM2.5 value drops to 29.