The black Arctic P14 PWM PST 140 mm fan generated at 1,700 U / min air flow of 72.8 CFM and a static pressure of 2.4 mm H2O . Connection is via 4-pin PWM connector. Also, this version of the P14 supports PWM Sharing Technology (PST), so that the fan speed of the P14 PWM PST can be synchronized with other fans via a 4-pin PWM socket. Arctic installs a high quality hydrodynamic plain bearing. This not only guarantees quiet operation, but also ensures that the volume does not increase over time. With a huge warranty period of ten years this shows the quality and reliability of the fan. Technical details:Dimensions: 140 x 140 x 27 mmWeight: 194 gMaterial: PlasticColour: BlackVolume: 0.3 sone / 23.5 dB (A)Speed: 200 - 1,700 rpmStatic pressure: 2.4 mm H20Airflow: 72.8 CFM / 123.76 m / hVoltage: 12VConnection: 4-pin PWM PSTWarranty: 10 years