Description: Expand the 10 pin fan 4-pin interface, solve the problem of missing motherboard interface, and centrally deal with fan wires. The PWM interface is connected to the CPU fan interface of the main board, and the red is the special interface for the CPU fan (with speed measurement function). The black interface is the PWM conventional fan interface (no speed signal, but does not affect the PWM function). The power supply can be directly powered by the power supply, which can reduce the load pressure of the motherboard. The temperature control line PWM is separately connected to the motherboard, and the power supply and temperature control are correct. Scope of application: it is applicable to 3pin / 4Pin fan of 12V main board. 3pin fan can also be used, but it runs at full speed when plugged in, because 3pin fan has no PWM speed regulation There is glue on the back of hub PCB board, which is easy to paste in a flat place. It also has a fixed reel hole. Specification: Size: 7 x 4.5cm/2.75 x 1.77inch Package Includes: 1 Piece Cooler Fan HUB Splitter Extension