General description The Air Purifier features an advanced 4-stage filtration system that effectively reduces 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, smoke, odors, mold spores, and pet dander. It is suitable for small to medium-sized rooms up to 20 square meters and operates quietly, with a low noise design of up to 28 dB, ensuring a comfortable sleeping environment. Technical specifications Filtration system: Pre-filter, real filter, honeycomb activated carbon filter, and sterilization cotton Noise levels: Sleep mode (