Phanteks 140mm Case/Radiator Cooling Fan (PH-F140XP_BK) Composed by MOSS and SSC systems, Phanteks' UFB bearings have an effective hub-tip ratio to achieve a state of equilibrium reducing air and vibration noise. PH-F140XP's PWM functions allow users to adjust speed from 600 - 1200 RPM. Higher speed for performance and lower for silent operation. Phanteks' unique fan circuit design provides a Fan Polarity Auto-Restart feature. The sensor inside of the fan will constantly send a series of rectangular signals to your PC M/B indicating that the fan is working correctly. Eight pre-installed rubber pads are now bigger and designed to reduce more vibration. Phanteks PH-F140XP comes bundled with accessories. Includes a 400mm extension cable to improve cable management and 4 to 3 pin adapter for use with a fan controller. Q.S.A adapter also included for settings from 300-900 rpm for a quieter set-up. Helps minimize the vibration and easy to use.