I picked up one of these at home hardware and I find it so convenient as you just plug it into any volt outlet.The carbon filters say they last three months and I have noticed they are now making the carbon filters with febreze scents!So this air odor eliminator can also double as a air freshener.The carbon filter traps and neutralizes odors.Its perfect for pet,smoke,kitchen and bathroom odors.The fan is very quiet I can hardly hear it.This really is a great chemical,green solution to any odor problems or if you just want your house to smell fresh.It also has a built in light that is perfect if your getting up in the night and need a small source of lighting so your not banging into things.The best part is its very reasonably priced!