... most effective media to remove airborne particles. The activated carbon is designed to absorb several types of smoke and foul ... , Etc..·Filters: Cotton filtering effect early, HEPA Filter, Activated Carbon and Photocatalytic.·UV: 254nm (20,000 Hour Life) Based on ... Filters Life: Depending upon usage, Cotton filtering, HEPA and Carbon: 3 to 6 months, Photocatalytic: 12 months.·MOQ: 500pcs. small air ...