1FUNCTIONAL DESIGN: PC 8 channels fan hub effectively lowers the fan speed when computer components are idle, reducing noise and power consumption. Conversely, it increases the speed when components are busy, lowering their temperature for optimal performance. 2ADJUSTABLE CONTROLS: 4 knob cooling fan speed controller features independent speed controls, offering personalized adjustments for every users needs and preferences. 3WIDE COMPATIBILITY: Cooling fan speed controller is ideal for a PC computer water cooling system with easy installation. It has a 4PIN interface (3PIN compatible) perfect for CPU, HDD, VGA, and PWM fans. 4SPACE SAVING: PC 8 channels fan hub speed controller is designed to fit precisely in the PCI slot of a computer case, allowing for easy installation without taking up valuable space. 5DURABLE MATERIAL: Made from quality plastic, metal, and PCB, our 4 knob cooling fan speed controller ensures long lasting durability and performance with low loss and heat generation. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.