Features: Extend the 10-pin fan to a 4-pin connector to solve the problem of missing the motherboard connector, and concentrate on handling the fans wires. The PWM interface is connected to the CPU fan interface of the motherboard, and the red interface is dedicated to the CPU fan (with speed measurement function). The black interface is a traditional PWM fan interface (there is no speed measurement signal, but it does not affect the PWM function). The power supply can be directly supplied by the power supply, which can reduce the pressure load on the motherboard. The PWM temperature control line is connected separately from the main board, and the power supply and temperature control are correct. Scope of application: 3pin/4pin fan suitable for 12V motherboard, 3pin fan can also be used, but the plug-in can run at full speed, because 3pin fan does not have PWM speed regulation. The back of the hub is equipped with 3M adhesive for easy sticking on a flat place. There is also a fixed hole coil (the product comes with a 40cm long PWM temperature control cable). Package Includes: 1PC x Cooling Fan Hub Specifications: Type: large 4D power port, SATA power supply (optional) Line interface: small 4Pin PWM Size: approx. 70x45x15mm / 2.76 x 1.77 x 0.59in note: No retail package. Please allow 0-1cm 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