Arctic F12 PWM 4-Pin PWM fan with standard case Long 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 life Perfect 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 & minimizes the noise level. Innovative Design Enables Quiet & Efficient Ventilation The innovative design of the fan blades improves the air flow & facilitates a highly efficient ventilation. The impeller was designed with a focus on minimzing the noise level yet delivering the desired airflow & pressure. Two Way installation Blow warm air out of the case Draw cool air into your case Air Flow: 74 CFM / 126 m&sup 3;/h (@ 1, 350 RPM) Noise Level: 0.3 Sone (@ 1, 350 RPM) Electrical Characteristics Typical Voltage: 12V DC Start-up Voltage: 6.0V DC (@ 100% PWM) Cable Length: 400mm Voltage Current 20% PWM 100% PWM 12V DC (Norminal) 0.05 0.24 7V DC 0.03 0.14 5V DC 0.02 0.1 Connection Motherboard: +12V DC PWM control signal 4-pin socket Standard 120 mm fan holes Warranty 6 Years limited warranty