Equipped with the advanced aerodynamic Flow Acceleration Channels system and Noctua's standard AAO construction, the NF-A6x25 5V PWM fan is the super optimized 60 x 25mm PWM enabled 5V version of quiet and premium quality. The NE-FD1 PWM IC fan designed by Noctua, which incorporates Smooth Commutation Drive technology as well as Noctua's SSO2 Bearing reference class, ensures optimal rotation smoothness and excellent long-term stability. Complemented by modular cables, an OmniJoin™ adapter kit, and a 6-year manufacturer's warranty, the NF-A6x25 5V PWM fan is an ideal choice for critical 5V applications requiring PWM control. As a 5V fan, the NF-A6x25 5V PWM cannot be used at 12V and will be damaged if used with standard 12V power sources such as PC motherboard fans. As a 5V fan, the NF-A6x25 5V PWM cannot be used at 12V and will be damaged if used with standard 12V power sources such as PC motherboard fans.