F12 PWM 4-Pin PWM fan with standard caseLong Service Life The Fluid Dynamic Bearing comes with an oil capsule that avoids lubricant leakage. Thus this bearing is as quiet as a sleeve bearing but comes with a significantly higher service lifePerfect Case Fan Regulation with PWM The PWM function allows the motherboard to run the fan precisely at its necessary speed. This guarantees the required cooling and minimizes the noise level.Innovative Design Enables Quiet and Efficient Ventilation The innovative design of the fan blades improves the air flow and facilitates a highly efficient ventilation. The impeller was designed with a focus on minimzing the noise level yet delivering the desired airflow and pressure.Specifications: Fan Speed: Air Flow: 74 CFM / 126 m³/h (@ 1,350 RPM) Noise Level: 0.3 Sone (@ 1,350 RPM) Connection Motherboard: +12V DC PWM control signal 4-pin socket Size & Weight Standard 120 mm fan holes