💦 ?2018 Upgraded Silent and powerful Design?: Extra-quiet operating noise, < 30db makes even sound-sensitive sleepers calmly dream. Two modes (Normal and Sleep mode). If you activate the sleep mode, the device is automatically switched off after 8 hours. 💦 ?High Quality HEPA Filter?: HEPA filter and activated carbon filter, can filter 99.97% of the dust, pollen, smoke, odors, mold spores, pet hair; Removes particles as small as 0.3 microns and and air pollution of PM 2.5. Essential Oil Diffuser use optional. 💦 ?Ideal for Allergy and Asthma?: Alleviates allergy problems and remove odors such as cigarette smoke. Ideal for people who suffer from allergies, nasal stuffiness, cough, sneezing, asthma, etc. 💦 ?Portable & Compact?: It's small size and modern design make it easy to fit in any small areas or rooms, yet powerful enough to deliver cleaned air 51-150m³/h. No ozone and UV-C light or ozone. 💦 ?Purchase with 100% Confidence?CE RoHS Certificated, 1-Year Warranty & Lifetime Support. Security for the whole home!