The NF-A9 5V PWM is a 5V PWM enabled variant of Noctua’s award-winning 92mm NF-A9 fan.Equipped with a standard AAO (Advanced Acoustic Optimization) chassis and sophisticated aerodynamic design measures, such as flow acceleration channels, the NF-A9 is renowned for its superior performance and exceptional silence.Smooth Commutation Drive technology and SSO2 bearing ensure excellent smoothness and reliability over the long term.Complete the equipment: USB power adapter cable, OmniJoin adapter set and 6 year manufacturer's warranty, NF-A9 5V PWM is an excellent choice for 5V applications requiring PWM control.Being a 5V fan, the NF-A9 5V PWM cannot be used at 12V and will be damaged when used with standard 12V power sources such as PC motherboard fans.