Features: Brand new and high quality 4Pin Fan Hub: If your motherboard lacks fan interfaces, fan hub is the neat and tidy way to expand. Support 4Pin dual-type standard fan port. Knob Adjust: High accuracy and good performance, equipped with an independent speed controller and the speed can be adjusted at will. Multiple Type: 8-fan stepless variable speed upgrade, 4-Knobs control speed regulation, power supply interface supports 4D/SATA, 6 types for your choice. Universal: Widely used for PC computer water cooling system, easy to install. Material: This Speed Controller adopts plastic and metal materials, durable, reliable, with low loss and low heat. Specifications: Material: Plastic, Metal Color: Black 8 Way: Voltage: 0-12V Connectable Fans: 8 Power: 72W Adjustment Method: 4 Manual Adjustment Knob Power Supply Interface: 4D/SATA(optional) Installation Position: PCI Position of PC Chassis Fan Interface: 4PIN (3PIN Can be connected) Package Includes: 1PC x Cooling Fan Hub note: No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!