The 4 in 1 DD1 Mini filter features with Anti Allergen, Deodorisation, Anti Bacterial & Dust Filtration. Anti AllergenAller Catcher can hold these allergens (dust mite, pollen) tightly, then decompose it into harmless protein. When artificial enzyme adsorb allergen protein, it will oxidate and cut off a part of protein’s molecular chain, making the protein structure to change. Artificial enzyme has similar structure with oxidase in human body. Size of artificial enzyme is one meter of ten billion, but the size of allergen protein is one meter of million. Because of allergen protein is huge than artificial enzyme, enzyme can not oxidate all the allergen protein. Artificial enzyme adsorbing on allergen protein will oxidate protein begin from weak part of molecular binding, then cut it. When allergen protein be cut, it will change it’s shape and will not be identify by the body system. Then the allergies will not going to happen. Anti BacterialArtificial enzyme and fiber which has positive ions adsorb the germ, destroy germ’s membrane, to make germ into non- activated status. DeodorisationBy using biological technics, make synthetic enzyme combine with deodorizing fiber and ion. It can exert strong decomposition on volatile organic compound (clothing, plywood, wallpaper, atmospheric pollutant, etc) and to exert it’s deodorizing properties. We recommend that the 4 in 1 DD1 Mini filter should be replaced every 6 months, depending on usage and the environment and cleaned every 2 weeks. Simply brush off the excess dust with a soft brush or a gentle vacuum will suffice, do not wash or rinse the filter. Compatible Model DD1 Mini Specification 4 in 1 Filter Anti Allergen YES Deodorisation YES Anti Bacterial YES Dust Filtration YES Applicable Models DD1 Mini Dimension mm 235 x 180 Color Light Blue Note: Due to our policy of innovation some specifications may be changed without notification. FEATURES 4-in-1 Function - Anti Allergen, Deodorisation, Anti Bacterial & Dust Filtration. Controls allergens Suitable for asthma, hayfever and allergy sufferers, effectively helps controls mould, condensation, bacteria growth, house mites and odour. Do not wash the 4 in 1 filter. Clean only with a vacuum cleaner or a soft brush. The filter should be replaced every 6 months, depending on usage and the environment. Compatible Model DD1 Mini