This purifier is new in box. I believe my grandmother purchased it from the home shopping network. The Pure Enrichment PureZone Halo is a compact air purifier designed for spaces up to 100 sq ft. It utilizes a 2-stage filtration system to remove dust, pollen, pet dander, smoke, and odors from the air. Offers a soft mood light and 3 fan speeds. The filter should be cleaned monthly and replaced every 6 months.