Main Feature: Description:8 Channels Cooling Fan HUB SATA/4Pin Power Supply 4 Knob Radiator Speed Controller for CPU PC Case ChassisFeature:This Speed Controller adopts brand new materials, with low loss and low heat.The precision adjustable resistance has high accuracy and excellent performance, and the speed can be adjusted at will.The cooling fan hub is equipped with an independent speed controller for you to adjust.8-fan stepless variable speed upgrade, 4-Knobs control speed regulation, one knob controls two fans.Professional high-speed regulating circuit, high performance, power supply interface supports SATA or 4Pin.Support 3Pin/4Pin dual-type standard fan port.Specification:Power Supply: SATA, 4Pin Material: Plastic + MetalColour: BlackPower Supply Voltage: 0-12VConnectable Fans: 8Adjustment Method: 4 Manual Adjustment KnobsInstallation Position: PCI Position of PC ChassisFan Interface: 4PIN (3PIN Can be connected)Size: 120 X 65 X 18mm/4.72 X 2.56 X 0.71" Warm Tip:It is normal for the built-in resistor of the Controller to heat up during use. In addition, there is a power limit and a single fan with a power exceeding 10W cannot be connected, otherwise the product may be easily damaged. The product is equipped with speed regulation chip and it is normal to heat up during use. As long as it is not overloaded, daily heat up will not affect the use.Note:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you2. Please allow 1-3mm measuring deviation due to manual measurement.