1Versatile Function: 8 channels fan hub reduces fan speed during idle computer components to minimize noise and power consumption. It increases speed during busy periods to lower component temperatures. 2Knob Adjustment: 4 knob cooling fan speed controller comes with independent speed controls, allowing precise adjustments for optimal cooling performance. 3Universal Compatibility: Widely used in PC computer water cooling systems, this controller is easy to install. Fan interface: 4 pin (compatible with 3 pin). Power interface: SATA interface. 4Space Saving: PC 8 channels fan hub speed controller is installed in the PCI slot of the computer case, offering convenient installation without taking up additional space. 5Durable Construction: Constructed with durable plastic and metal materials, the 4 knob cooling fan speed controller is reliable, low loss, and low heat, ensuring long lasting usage.