General description If you want to find a high-quality portable air purifier for your bedroom that is economical and safe to use, our air purifier will be your best choice. It features an efficient 3-stage filtration system that removes at least 99.97% of dust, pollen, smoke, odors, and pet dander, filtering particles as small as 0.3 microns and PM 2.5 air pollution. With powerful 360° purification performance, you can enjoy the cleanest and freshest air. This ultra-quiet model has been upgraded to a low noise version, helping you sleep soundly. Technical specifications Filtration Performance: 99.97% Particle Size Filtered: 0.3 microns Air Pollution Filtered: PM 2.5 Operation Time Before Filter Change: 1500 hours Usage Designed for use in bedrooms, home offices, offices, and small spaces. Easy operation with a single one-touch button to switch between 2 fan speed levels. Smart filter change reminder: The On/Off button light flashes when the filter needs to be replaced.