Noctua NF-A4X10 PWM 24V 5000RPM 40x10mm Quiet Cooling Fan\n\nNF-A4x10 24V PWM 40mm Fan [features] The NF-A4x10 24V PWM is a PWM-enabled 24V variant of Noctua\u2019s award-winning; premium-quality NF-A4x10 40mm fan. As such; it is ideal for 24V-based 3D printers as well as various other 24V applications. Featuring an AAO (Advanced Acoustic Optimisation) standard frame and sophisticated aerodynamic design measures such as Flow Acceleration Channels; the NF-A4x10 is renowned for its superior performance and outstanding quietness of operation. Smooth Commutation Drive technology and Noctua\u2019s reference class SSO2 bearing guarantee superb running smoothness and excellent long-term stability. Topped off with the included OmniJoin Adaptor Set; NA-AC9 adaptor cable for popular 3D printers (e.g. Creality Ender 3 & CR-10; Anycubic Mega); Low-Noise Adaptor and 6-year manufacturer\u2019s warranty; the NF-A4x10 24V PWM is a premium choice for demanding 24V applications with or without PWM;