Enjoy air quality at its best, this is accomplished by 3 sensors the PM2.5, VOC and the light sensor. The PM2.5 sensor detects small floating particles in the air, the VOC detects the chemical compounds of the atmosphere while the Light sensor perceives the brightness levels of the room. By providing all the above information, through the sensors, the device is always aware of its surrounding air conditions and is able to adjust and provide clean air.