Air purifier: effectively capture PM2.5, dust, allergens, pollen, mold, smoke, and reduce HCHO and peculiar smell in the air Bring fresh and healthy air to your home. The sterilization rate is almost as high as 99.97% Three wind speed: normal; quiet; efficient mode. -Timer setting: 2H, 4H, 6H, 8H with indicator lights respectively. Set up scheduled tasks to save energy and money. -Low noise: silent operation, timer function up to 12 hours. Provide a comfortable and pleasant environment. "Note: The plastic of the filter should be removed before use. The filter can be used for up to half a year. Then you must replace it About the filter element: You need to replace the filter element, you can buy it directly in our store. "