Model : EFB0405VHDDimensions : 40 * 40 * 20mmBearings : Superflo ( double ball bearing )Voltage : DC5VNoise : 30.5dBACurrent : 0.50AActual current : 0.32ASpeed : 8200 ± 10% RPMWind : 10.10cfmMaintaining optimal continuous operating time of 80,000 hoursFan connectors: 3-pin connectorFeatures double ball bearing maintenance , long service life , with plenty of cooling air volume and pressure