Advanced 4-Stage Filtration eliminates 99.99% of particles in the room
› Pre-filter: filter for larger particles like hair and dust
› HEPA H13 filter filters the finest particles and pollution
› Active carbon filter: filters odors and VOC (volatile organic compounds)
› Anti-Microbial layer: eliminates bacteria
Change the filter when the replacement alert button turns red. (Used for 4,000 hours, replace the filter about half a year)