Feature: 1. Adjustable Speed: The speed controller and the hub are used together, and the speed of multiple fans can be adjusted at the same time with one knob, and 24 fans can be adjusted at the same time. 2. PWM Speed Control: Fan controller speed control mode is 0‑100%PWM, and the default frequency is 2K‑50KHZ adjustable. 3. 3Pin 2510 Wiring Port: Fan hub adopts 3Pin 2510 wiring port, with power indicator and working indicator light, which is convenient for you to observe at any time. 4. Ventilation and Heat Dissipation: Fan controller hub can be used for fan speed adjustment, air volume adjustment, ventilation and heat dissipation assistance. 5. Plastic Material: Fan controller hub is made of plastic material, which is wear resistant and durable, and can be used for a long time. Specification: Item Type: Fan Hub Material: Plastic Model: For FC-D012-P000 Power Input Interface: 4P Computer Power Interface Output Fan Wiring Port: 3Pin 2510 Power Indicator: LED Indicator Mounting Hole Diameter: Approx. 3mm / 0.1in, 4 Holes Size: Approx. 38.5mm / 1.5in, Approx. 44mm / 1.7in, Approx. 28mm / 1.1in, Approx. 33mm / 1.3in Purpose: Auxiliary Chassis Heat Dissipation. Package List: 1 x Fan Hub