Membrane Solutions MS601 Air Purifier True HEPA Filter Air Cleaner For Extra Large Room About this item True H13 HEPA Filter, 100% Ozone Free - The H13 True HEPA air purifier reduces up to 99.97% of harmful germs, hair, pet dander, dust, smoke, pollen and other allergens as small as 0.1 microns. Improve your air quality and help you and your pets relieve sneeze, cough, sinuses and heavy breath. Air Quality Sensor - MS601 extra large room air purifier advanced smart sensors detect particles and odors like smoke and pet odors, making it the ideal hepa air purifier for large rooms. The Real-time PM 2.5 Air Quality Display keeps you informed while Smart Auto Mode automatically adjusts fan speed based on air quality. Trust the MS601 air purifier that tells you air quality to provide the best air purification for your large spaces. Upgraded Silent and Powerful Design - 360°Purification Performance makes the air circulates faster, enhancing the air clearing efficiency. Upgraded Low noise version(21dB)