Description: Easy Installation: The governor is installed in the PCI position of the chassis, which is convenient for installation and does not take up space. Computer power supply: The governor is connected to the computer power supply and the power supply is sufficient to meet the power supply requirements of 6 fans One key Operate: stepless knob speed regulation Turn the knob to realize speed regulation, and the fan can be shut down freely to save energy and mute Functions: Reduce speed to reduce noise & power consumption when computer parts are free. Increase speed to reduce computer part temperature when computer parts are busy. Available to install fan speed controller.Adjustable knob available to adjust cooling fan revolution speed. Specification: Product Name: Chassis Fan Speed Controller Power supply connection: large 4Pin/SATA Connectable fans: 6 sets of fans Speed regulation power: 90W (single 15W) Fan connection: small 3Pin/small 4Pin Supply voltage: 12V Speed regulation mode: manual knob speed regulation Voltage regulation range: 0V-12V Installation location:  PCI  Package Includes: 1 Piece PC Cooler Cooling Fan Speed Controller Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!