Description: Function: smoke and dust removal Product color: Black Material: Ceramic+ABS Power mode: USB Battery capacity: 4000mAh Rated voltage: 5V 2A Rated power: 3W~5W Control method: push-button Noise: 25~33db Applicable places: indoor Filter type: composite filter Application area: 10㎡ -25㎡ Working principle: negative ion Anion concentration: 15 million/cm² Product size: 16.5*16.5*10.3cm/6.5"*6.5"*4" Applicable to: home, office, business negotiation,car driving, KTV, hotel, Internet cafe, chess room, etc. can also be given as gifts to each other.
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