Feature: 1. INCREASE FAN WIRING PORT: The hub is used to expand the fan interface to increase the fan wiring port, useful and practical. 2. ADJUST SPEED OF FAN: The governor is used to adjust the speed of the fan, adjust the air volume, and assist in ventilation and heat dissipation. 3. ADJUST 24 FANS AT THE SAME TIME: When the speed controller and the hub are used together, one knob can adjust the speed of multiple fans at the same time. An example has been used to adjust 24 fans at the same time with a single knob. 4. 2K‑50KHZ ADJUSTABLE DEFAULT FREQUENCY: The speed control mode of this product is 0‑100%PWM, default frequency is 2K‑50KHZ adjustable, and low frequency or high frequency PWM can be customized. 5. POWER INDICATION AND WORKING INDICATOR LIGHT: There are power indication and working indicator light, easy to see and convenient for operation. Specification: Item Type: SATA Power Interface Fan Speed Controller Model: FC-D012-P008 Power Supply Voltage: 12V Power Supply Current: 10A Power: 50W Fan Wiring Port: 4P 2510 interface Power Interface: SATA power interface Installation Method: Computer chassis baffle plate installation Purpose: Fan speed adjustment, air volume adjustment, ventilation and heat dissipation auxiliary . Package List: 1 x SATA Power Interface Fan Speed Controller Note: Select Power Supply: Reserve at least more than 20% of the power capacity. The voltage depends on the load voltage.