"Tiny Cooling Fan" There are two measures of size specifications, one is the use of volume, such as 80 * 80 * 20mm, this representation for L * W * H, this method is a fan of the parameter table used mostly . Is based on the size of the diameter of the fan, generally equal to the "Tiny Cooling Fan" volume parameter length and width. We usually go to the counter to buy the fan on when using the latter representation, because it is relatively simple, such as "the boss, get me a 8cm fan." Size has a great influence on the capacity of the fan, the air flow at the same speed large-sized fan is much larger than the small-sized. In other words, get the same amount of wind, the large size of the "Tiny Cooling Fan" can be a lot of speed, which can effectively reduce the noise than the small size is small.