PC Fan Noctua NF-A4x10 5V PWM:This Noctua NF-A4x10 5V PWM epitomizes a very effective fan that is ready to adjust the air cooling system in a PC case . The PC fan will satisfy those who do not want to be disturbed by strong lighting in the evening, because this model does not have any backlighting. Another advantage is also the the lower cost of the fan. The 40 mm fan size makes it simple to connect with all standard PC cases. Also consider the operating voltage, which in this case is 5 V. Youll find 1 fan in this package. Noctua NF-A4x10 5V PWM PC Fan Key Features The airflow of 5,23 CFM is sufficient for decreasing the temperature in your PC Distinctive and original design This durable computer fan has unique bearings for prolonged usage Operating voltage: 5 V The NOCTUA PC Fan Is Perfect for Any Computer Case In order to link up the Noctua NF-A4x10 5V PWM, you also need a 4pin PWM connector.