Features:This cooling fan is specially designed for Antminer mining.High speed up to 7000RPM makes heat dissipation super fast.Large wind-force up to 250.3CFM makes this 4 pin cooling fan capable of dissipating overall high heat that caused by long time operation.Low noise of 70dBa enables it to blow very quietly.PWM modulation function makes this PC cooling fan suitable for different situations.High accuracy dual ball bearing gives a super long service life with no maintenance required. So practical.Specifications:Product type: Cooling Fan for Antminer MiningMaterial: ABSPower: 36WCurrent: 3ABearing: High accuracy dual ball bearingRevolution speed: 7000RPMNoise: 70dBaWind-force: 250.3CFMInterface: 4pinPWM modulation: SupportPackage size: approx. 15 x 13 x 4.5 cm/ 5.91 x 5.12 x 1.77 inPackage weight: 270gPackage List:1 x Cooling Fan for Antminer Mining.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.