Designed in California. 100% ozone free, does not use UV or Ions which produce trace amounts of measurable ozone, a harmful air pollutant 3 Stage Filtration System: Pre-filter, TRUE HEPA Filter, & Activated Carbon Filter. It removes 99.97% of dust, pollen, smoke, odor, mold spores, and pet dander; filters particles as small as 0.3 microns and larger and filters air pollution of PM 2.5 3 Speed Settings (low, medium, and high) provide options for various conditions. Traps dust mites, large particles, and pollen. The Activated Carbon Filter is on the reverse side of the True HEPA Filter Quietly operates throughout the night, and has a gentle night light with two brightness settings Unique size and contemporary design makes it a perfect fit in smaller rooms or office spaces. The perfect gift for family, friends, and office mates 1-year buyer assurance (with a free option to extend it by 1 more year) and lifetime support. Note: please remove the plastic bag of the HEPA filter and charcoal filter before running the air purifier On average, the filter should be replaced every 6 months and is available for purchase (Search for: LV-H132-RF); the air filter may need to be replaced sooner or later depending on the air quality in your area