The pre-filter cleans the air of common dust particles, while the HEPA filter additionally removes ultra-fine particles up to 0.3 micrometers (e.g., smoke particles) from the air, making it particularly suitable for allergy sufferers. The additional bacteria filter effectively combats bacteria and viruses, while the odor-neutralizing activated carbon filter reliably eliminates unpleasant odors in the home—whether in the kitchen, bedroom, or any other room. The filter status of the air purifier is constantly displayed in the top left corner of the digital screen. This way, you always know how long the filter will be able to keep your air free from pollen, dust, smoke particles, pet hair, and pollutants. This is especially a helpful feature for allergy sufferers.