Selling computer accessories shops are selling USB "220V Cooling Fan". Within one of the larger shops, USB small fan, priced at 10 yuan to 80 yuan per month. Sales staff said, after the summer, USB small fans are more and more consumers, sales are very popular. "These"220V Cooling Fan"price in the tens of dollars up and down, easy to carry, can easily be placed in any one place, so sales are good, since nearly a month, the daily average can sell dozens." Street, a ten yuan shop owner said, these "220V Cooling Fan" shape, mostly very "Moe" cartoon characters, colorful brilliant colors. The price is according to different styles and features to set, more than ten yuan to tens of dollars.