PC Fan - size: 120 × 25mm, 300 RPM - 1800 RPM, 12 V, 4pin PWM, PWM The SilentiumPC Fluctus 120 PWM typifies a very effective PC fan that is suitable to regulate the cooling in a PC case . The computer fan is perfect for those who do not want to be disturbed by a coloured backlight when working or playing in the dark, because this model does not have any backlighting. Another advantage is also the the lower cost of the fan. The 120 mm fan size makes it easy to fit into all popular PC case formats. Also take into account the voltage required for operation, which in this case is 12 V. There is 1 fan in this package. SilentiumPC Fluctus 120 PWM Computer Fan Key Features Modern and striking style This durable computer fan has special bearings for prolonged usage Operating voltage: 12 V The SilentiumPC PC Fan Is Perfect for Any Computer Case In order to safely connect the SilentiumPC Fluctus 120 PWM, your PC must have a 4pin PWM connector.