Why Waterproof Cooling Fan technology does not always mention high?

  Why do people think of buying cheap foreign "Waterproof Cooling Fan", immediately think of China? Often there will be some customers called to ask cooling fan, hear us say after the quote, which I now take only fan factory in XX dollars, you so high, of course I am sure that you can get them "Waterproof Cooling Fan"face to face and race with us, we removed more than what the fan inside the accessories, the quality of what he used, I use what is quality, or fill understand, we can find a professional to ask, he accessories, and where the difference between our accessories, such as a simple fan IC, we use 8 hair, and their "Waterproof Cooling Fan" IC3 hair. Why is it so cheap then, obviously tell you, used cheap? Fool knows, of course, cheaper second-hand ah, quality guaranteed it, bought second-hand all know, of course not ah.