PC Fan Noctua NF-A9 5V PWM:This Noctua NF-A9 5V PWM is a highly powerful PC fan that is ready to enhance the air cooling system of a PC. The computer fan will suit those who do not want to be disturbed by coloured radiation from the PC in the night hours, since this model is without backlighting. Another advantage is also the the lower cost of the fan. This 92 mm fan size makes it easy to connect with all standard computer cases. A crucial parameter is also the operating voltage, which for this model makes 5 V. There is one fan in this package. Noctua NF-A9 5V PWM PC Fan Key Features The airflow of 78,9 CFM is sufficient for reducing the temperature in your PC Unique and striking style The quality computer fan contains special bearings for smoother air flow Operating voltage: 5 V The NOCTUA Fan Is Perfect for All Types of Computer Cases To connect the Noctua NF-A9 5V PWM, your PC must have a 4pin PWM connector.