WBM Smart Air Purifier Create purified ambience and healthier life. 3 in 1 Filtration function 1-pre-filter, 2- true HEPA filter and 3- activated carbon filter captures the allergies and pets, Smokes and remove 99. 97% of pet dander, dust, pollen, odor, mold, etc. Effectively improving indoor air quality and freely enjoying fresh air at home. keep your home purify with WBM Smart Air Purifier Create purified ambience and healthier life. WBM HEPA filter is easy to be replaced and disposed without any tool required, ensuring you to replace your old filter in minutesWarm Maintenance Tip: When your air purifier filter gets old, the efficiency will decrease when your air purifier is running, leaving more pollutants in the air. Therefore, it is recommended to replace your filters for every 2-3 monthsInstructions : Filters are sealed to protect their lifetime. Please remove the plastic packaging of the new filters before placing them into air purifier.