The alternating current fans, or AC fans, are powered with a changing voltage of positive and of equal negative value. In general, this changing voltage has a sinusoidal shape. Worldwide, the usual value of this sinusoidal voltage may vary in size and in frequency,

This Brushless DC Cooling Fans are operating at 220/240V with a dimension of 90x90mmx25mm. This Cooling fans helps your electrical products cool, extend the life of the system, and perform better. DC cooling fans are rugged and resistant to high temperatures. The new fan is of excellent quality and attractive price. Easy to install and draws in hot air from inside the enclosure. Increase the airflow in your system. Cool the entire case.  System life and computer work better.