usb air purifier Feature: 1)Use water to purify the harmful substance in the air. 2)Swift to eliminate smoke. No need to worry about the harmful smog especially the secondhand smoke. 3)Good ability to remove dust. Easy to eliminate different allergens and reduce allergy and asthma Humidifies air and effectively prevents air conditioner disease. 4)the working theoryof the usb air revitaliseris sihpon and centifugal force.it sihpon the mixture of the air revitalising and contrate and water into the sucker and then with high speed rotation the mixture concentifugallyspreads onto then container and form a water layer to eliminate dusts and purifying dusts ans bacterias through the water layer 5) powered by computer with usb plug Packing: product size:12x10x10cm Color box size:12 x12 x 14.5cm QTY:36pcs per carton Carton size:74x25x46cm G.W.:15.5kg Conveyance: Qty/20' FCL: 12,384pcs Qty/40' FCL: 25,920pcs Qty/40' HQ: 28,800pcs