General description If you are looking for a high-quality portable air purifier for your bedroom that is economical and safe to use, this air purifier is the best choice. It features a powerful 3-stage filter system that removes at least 99.97% of dust, pollen, smoke, odors, pet hair, and filters particles as small as 0.3 microns, effectively tackling air pollution. Technical specifications Filter performance: 99.97% against dust, pollen, smoke, and odors Filter particle size: up to 0.3 microns Purification area: 20 m³ Usage Designed for use in bedrooms, home offices, and small spaces Easy to operate with a single button to switch between two fan speed levels Intelligent filter change reminder: the light on the "On/Off" button flashes after 1500 hours of use, indicating that the filter needs to be replaced Other information Extremely quiet operation for peaceful sleep Compact size for easy placement in various settings 360° purification performance for the cleanest and freshest air