Feature:1. Fan Controller: Through a single knob, this USB fan controller can adjust up to 24 fans at the same time, very convenient.2. Easier Cooling: Allows for wide application in fan speed and air volume adjustment to better control the heat dissipation.3. PWM Adjustment: The speed control mode is 0100% PWM mode, and the frequency can be quickly adjusted from 2KHz to 50KHz.4. Better Display: Equipped with indicator to clearly show the power and working statue, the whole operation is very simple.5. Easy to Install: Comes with 4pcs 3.2mm installation hole, the lightweight and compact fan controller is easy to install.Specification:Item Type: USB Fan Speed ControllerFan Wiring Port: 4Pin, 2.54mm / 0.1in(approx.) pin interface. Power Supply Current: 10APower: 100WInstallation Fixing Hole Diameter: Approx. 3.2mm / 0.13in, 4 holes. .Package List:1 x USB Fan Speed Controller