The NF-A4x10 5V PWM is a special, adjustable via PWM 5V version of Noctua's highly optimized soft 40x10mm premium fan that draws on the AAO-frame system and advanced aerodynamic design measures such as Flow Acceleration Channels. The specially designed non-FD3 PWM IC with integrated Smooth Commutation Drive technology and the reference-class storage SSO2 offer excellent running smoothness and excellent long-term stability. Modular cabling and adapter set OmniJoin make the NF-A4x10 5V PWM to a premium solution for demanding applications with 5V PWM control.