Corsair AF140 Quiet Edition High Airflow 140mm Fan High Airflow for Efficient Large-Volume Cooling: Air Series AF case fans perform best in unrestricted spaces with at least 3 cm (1.2 inch) of clearance, and they're ideal for mounting at the rear or top of your PC case as exhaust fans for your PC's motherboard and CPU, graphics accelerators, and other components that fill the case with heat. They work equally well as unrestricted intake fans for areas like side panels or bottom intakes. For high restriction areas like hard drive cages or in other tight spaces where there's less air volume, check out our Air Series SP models of high static pressure fans. Performance: AF140 Quiet Edition: - Size 140mm x 25mm - Operating Voltage 7V - 12V Performance at 12V: - Airflow 67.8 CFM - Static Pressure .84 mm/H20 - Sound Level 24 dBA - Speed 1150 RPM - Power Draw 0.1 A System requirements: - Motherboard with an open standard 3-pin fan connector What's in the box: - AF140 Quiet Edition Airflow Fan. - Three colored rings in red, blue, and white. - Mounting Screws. - Voltage step-down adapter for lower speed operation.