Plug in to a better air care experience. The high-speed fan draws air through the charcoal filter, helping to clean the air for a better experience. The 30-day air-freshening for larger spaces. Dry fragrance refills contain 3-5 times more fragrance than grocery store purchased plug-ins and freshens more space. Taking care of the planet is important. Refills are 100%. Available in (7) Fragrances.