Features: 100% brand new and high quality Increase speed to reduce computer part temperature when computer parts are busy. Reduce speed to reduce noise and power consumption when computer parts are free. Professional high-speed regulating circuit, high performance, power supply interface supports big 4Pin/SATA. The governor is installed in the PCI position of the chassis, which is convenient for installation and does not take up space. PCI bracket available to install fan speed controller, to adjust cooling fan revolution speed. Package Includes: 1 x Speed Controller Specifications: Power Supply: 4Pin/SATA(Optional) Material: Aluminum Alloy Colour: Black Power Supply Voltage: 0-12V Connectable Fans: 8 Installation Position: PCI Position of PC Chassis Fan Interface: 4PIN (3PIN Can be connected)/SATA Size: Mixed note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.