The Noctua NF-A8 5V exemplifies a highly powerful PC fan that has been designed specifically to adjust the cooling in your computer. This computer fan is perfect for those who do not want to be disturbed by light from the inside of the PC in the night hours, since this model is without backlighting. Another plus is the the significantly lower price. The 80 mm fan size makes it easy to install in all standard PC cases. Also take into account the voltage required for operation, which for this model makes 5 V. There is 1 fan in this package.