... stage starts with Cotton filtering effect early.2nd stage is an Mini-HEPA Filter3rd stage consists of 2 Photocatalytic Filters ... (TiO2)4th stage comprises a UV Light5th stage is an Activated Carbon Filter - Absorb mild smoke and odors.6th ... / 3hours / continuous “Serial” mode.·Usage: Boat Cabins, Yacht Cabins, Auto, Bedroom, Living room, Cookroom, Hospital, Etc..·Filters: Cotton filtering effect ...