Airtok AP0601 air purifiers utilize a high-efficiency 4-in-1 H13 True HEPA filtration system to refresh the air in a 183 sq ft room up to five times per hour. Designed for quiet operation, these units feature a GentleNight light and a low-noise sleep mode reaching only 25dB. The integrated aroma pad allows for the addition of essential oils to circulate fragrance throughout the living space. This ozone-free system is certified by CARB, ETL, and FCC, making it a safe choice for removing smoke, dust, pet dander, and odors.