Feature:1. Faster Cooling: With this fan hub, you can easily integrate several fans to have quick and sufficient cooling on chassis.2. Practical Uses: Allows for application in fan speed adjustment, air volume adjustment, ventilation, heat dissipation, etc.3. Better Control: Can also use in conjunction with speed controller to simultaneously adjust the fan speed with one button.4. Easy Operation: Equipped with LED indicator to clearly show the status of power and working, the fan hub is simple to use.5. Simple to Install: Comes with 4pcs 3mm installation hole, the convenient installation can be easily finished in minutes.Specification:Item Type: Fan HubModel: FC-D012-P003Power Supply Voltage: 5V (2A)Power Input Interface: Mini USBOutput Fan Wiring Port: Approx. 2.54mm / 0.1in + 2mm / 0.08in pitch fan wiring socket. Power Indicator: LED IndicatorInstallation Fixing Hole Diameter: Approx. 3mm / 0.12in, 4 holes. Function: Auxiliary chassis heat dissipation.Package List:1 x Fan Hub