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 and minimizes the noise level.   PWM Sharing Technology (PST) Lowers Noise If you want to improve the cooling efficiency of your computer you get several case fans working in parallel (since it takes 10 fans to double the noise level). But what does it help if they dont work together? The PST assures that all of your fans listen to one control signal. E.g. you share the CPU Coolers PWM signal and assure that your case fans stand down at low load and spin up whenever necessary   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. Specification Type: 12cm Case Fan AMD/Intel: N/A Fan Connector(s): 4-pin Installation: Screws LED Lightin No Colour: Black Weight: 109 g Fan Dimensions: 120 x 120 x 25 mm Fan Controller: PWM Rotation Speed: 230 - 1350 RPM Fan Bearin Fluid Dynamic Air Flow: 53CFM (90.1 m3/h) Noise level: \"0.3 Sone (@ 1,350 RPM)\" Power: 12V DC Package Type: Retail Package Weight: 0.1470 kg Warranty: 6 Years