Product parameters:Module: Fresh air moduleFiltration efficiency: 99.98% (particles above 0.3 microns)Battery capacity: 600MAHInput voltage: 5VMaximum fan air volume: 4.5CMFMaximum noise: 27DBAFeatures: Intelligent fresh air active air supplyFan air volume: third gearCharging time: about 2HLife time: high speed 4H, medium speed 6H, low speed 8HProduct color: dark grayPacking list: silicone liner *1 mask body *1 fresh air module *1 filter *5 tool *1 manual *1 charging line *1Material and function descriptionFilter element:1, high-efficiency fiber filter layer: can filter large particles above PM102, high-efficiency composite shell active carbon particles: can absorb odor and formaldehyde and other substances3, HEPA (Hapa) melt-blown composite filter cotton: can filter 0.3 micron particlesMask material: imported polyester PU spongeLiner: Silica gel, non-toxic, tasteless and non-irritating
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