Coarse filter (AV-990 sterilization) - effectively kill the natural bacteria in air pollution, more than 20 microns can filter all kinds of pollutants, such as: hair, dander, fibers, pollen, mold, etc., can be repeated wash use.

HEPA filter layer - an advanced and efficient air purification materials, particle size of 0.3 micron particulate matter removal efficiency of 99.97% or more.

Catalytic activated carbon layer - Activated Carbon for the air of toxic gases, smell a strong adsorption capacity level, sub-are used in catalytic activated carbon absorption edge, edge decomposition, no secondary pollution, greatly extended service life.

Negative oxygen ions released - fresh air and pleasant.