RECOMMENDED USES FOR FILTER:
7-10 DAYS 
 
Filter Description
Filtration technology: made of activated carbon and non-woven melt-blown filter cloth, five-layer filter system effectively keep away from PM 2.5 and a range of airborne contaminants.
 
Use Suggest: usually recommend replacing the filter once a week
 
Reasonable size: filters size measures approx. 12 x 8 cm/ 4.7 x 3.1 inches, easy to insert or replace the original one with no problem.
 
 
Good design: multiple protection to isolate dust, multi-layer folding, good ventilation, against nasty substances, gases, and odors.
 
 
The filters anti airborne particles dust, seasonal allergies, smoke, pollution, ash, gardening pollen and so on, suit to most occasions.