Air Purifier With True Hepa Filter,20m 99.97% Filtering Performance (air Purifier) f74 If you want to find a high quality portable air purifier for bedroom, while economical and safe to use, our air purifier will be your best choice. Processed with an efficient 3-stage filtration system: removes at least 99.97% of dust, pollen, smoke, odors, pet dander, filters particles as small as 0.3 microns and pollution from PM 2.5 air. Powerful: 360 purification performance, enjoy the cleanest and freshest air. Ultra quiet: upgraded level to a low noise version, helping you sleep soundly. Compact Size: This mini air purifier was designed for use in bedroom, home office, office, small spaces. Easy operation: one-touch button to switch between 2 fan speed levels. Smart filter change reminder: when the air filter operates for up to 1500 hours, the On/Off button light flashes, the filter must be replaced.