Description: 3Pin/4Pin Fan Hub: This fan hub is the neat and tidy way to expand your motherboard fan interfaces. It SUPPORT 3Pin/4Pin dual-type standard fan port. High accuracy and good performance, the speed can be adjusted at will under the independent speed controller. Multiple Type: 8 way fan stepless speed change upgrade, 4 knobs to control speed, 1 knob to control 2 fans. Widely used for PC computer water cooling system, easy to install. Made of plastic and metal materials, durable, reliable, with low loss and low heat. Specification: Material: plastic + alloy Size: about 150x105x20mm/5.91x4.13x0.79inch Color: Black Power Supply Voltage: 0-12V Max limit power 72W(theoretical value) Connectable Fans: 8 Fan Interface: 4pin(3pin Can be connected) Adjustment Method: 4 Adjustment Knobs Installation Position: PCI Position of PC Chassis Package Includes: 1 Piece Computer Case Cooling Fan Hub Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!