Impressive and Powerful: Enjoy fresh air in 12 minutes with the K3 True HEPA Air Purifier. Featuring HEPA technology and a 360 air intake, the K3 refreshes the air 5 times per hour in rooms as large as 219 sq. ft. or 20 sq. m HEPA filter at 99, 97 percent : H13 True HEPA filter works with pre-filter and high efficiency activated carbon filter to capture 99.97 percent of 0.3 micron airborne particles, such as dust, smoke, pollen , the smells. and other allergy symptoms caused by airborne contaminants. Quietest Air Cleaner: Choose sleep mode Reduce noiseat night, then forget about your whole air purifier while you sleep. The 7-gradient color nightlight can also be turned off to enjoy a perfect night's sleep without the effect of light. Volcano Shape Design: The K3 practically serves your home while still melting into your decor. It's like a volcano, filters dust and smoke through the H13 HEPA filter, then uses the cool air to give you the peace and quiet of being in a lake. Note: It's all too easy to start operating an air purifier without first removing the plastic wrap the filter comes in. This is a common mistake. So please remove the packing bag from the filter element before using.