Westinghouse Battery Powered Air Purifier with NCCO Technology is the perfect solution for your office, car, camper, and tents and will cover up to 65 square feet. The NCCO technology will decompose gaseous pollutants into H2O and CO2 and will kill bacteria and viruses. The 1804 has a 3-stage filtering system with HEPA and NCCO filters to filter particles to 2.5 microns, including smoke, dust, dander and mold.