Keep airborne contaminants out of your home with the Levoit Core 300 Air Purifier. The Pre-Filter captures large particles like pet fur and hair. The Main Filter captures allergens like pet dander and pollen. The High-Efficiency Activated Carbon Filter’s ARC Formula adsorbs odors and chemically decomposes them to prevent second-hand pollution. The air purifier refreshes air up to 5 times per hour in rooms as large as 220 sq ft or 20 sq m with VortexAir Technology’s spiral airflow. The durable internal structure offers an increased lifespan, and the convenient Check Filter Indicator reminds you when it might be time for a new filter.