Features 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 0‑100% 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 Controller Fan Wiring Port: 4Pin, 2.54mm / 0.1in(approx.) pin interface. Power Supply Current: 10A Power: 100W Installation Fixing Hole Diameter: Approx. 3.2mm / 0.13in, 4 holes. Package List 1 x USB Fan Speed Controller