3 Speeds Air PurifierAir purifier with 3 speeds and 3 filters. The prefilter filters out larger particles, hair and dust. The Hepa H13 filter captures formaldehyde and more than 99. 95% of particles with a diameter of 3cm and above, including PM 2. 5, smoke particles, pollen and even some pathogenic bacteria. The high quality active carbon filter can capture some harmful chemicals, as well as being effective against odors and smoke. Touch control panel and indicator