Features: 1.Knob Adjustment: This 4 knob cooling fan speed controller is equipped with the independent speed controller. 2.Lower Temperature: This cooling fan speed controller slows down when computer components are idle to reduce noise and power consumption. Increase speed to lower temperature of computer parts when they are busy. 3.Durable Material: This PC 8 channel fan hub is made from premium plastic and metal material, which is durable and reliable. 4.4Pin Interface: PC fan splitter is widely used in PC computer water cooling system, adopting 4 Pin (3PIN Can be connected) fan interface. 5.Space Saving: This PC fan controller features mini size that is suitable for many PC chassis, and it's installed in the PCI position of the chassis. specification:Item Type: PC Fan Hub Material: Plastic, Metal Power Supply Voltage: 0 to 12v Connected Fans: 8 Fan Port: 4PIN (Can Be Connected to 3PIN) Power: 72W Adjustment Mode: 4 Manual Adjustment Knob Power Interface: 4Pin Interface Installation Position: PC Chassis Position Pci PackageList:1 x PC Fan Hub 1 x Screw