Speed: 950 ~ 2000 RPM (a10%) Air Flow: 66 CFM at 2000 RPM (a10%) Air Pressure: 2.74mm H2O at 2000 RPM (a10%) Voltage: Operating - 12 VDC, Starting - 5 VDC Bearing Type: Fluid Dynamic Bearings (FDB)With the introduction of dual frame design of the Bit Fenix Specter Pro series we raised the standards of system fans to a new level. The new Bit Fenix Specter Xtreme fans offer many features redefining the standards of cooling fans. Specter Xtreme gives you the best performance and aesthetics using the latest in cooling fan technology and innovative designs. Cooling fans used in liquid cooling systems not only need to have a high airflow but also they need to be optimized for static pressure. Bit Fenix Specter Xtreme is engineered to provide an extremely silent performance.