Conair kindly gave me a free Conairpure Air Purifier so I could review it. This unit is small and portable, great when traveling, and takes up very little room. With all the allergens in the air, this product is being used mostly in my bedroom. My husband has really bad allergies and since using this product he seems to be coughing and blowing his nose less. This purifier is rechargeable which can be good and bad. It will run 22 hours on low but on high for only a few hours. So I usually use it on high for an hour or two and then switch to low for nighttime. it also has a replaceable HEPA filter. Overall I am very happy with this product.