100% brand new and high quality Features: Effectively reduces fan noise. Lets you escape from enduring CPU noise. The effect is good! At the same time, it can extend the fan's lifespan. It can achieve the effect of extending the fan's power cable, which can be said to serve multiple purposes. Easy to use, one end is connected to the fan's power cable, and the other end is connected to the fan's power interface on the motherboard. Specifications: Name: CPU 4pin down-speed cable Material: Copper Length: approx. 12cm/4.72in Interface: standard 4 pin (male -- female) Note: The resistance in the down-speed cable will heat up when working, which is a normal phenomenon Professional 4P fan silent down-speed cable, through the principle of connecting a resistor in series, to reduce the fan voltage and thus reduce the fan speed. Applicable to all fans with 4pin interface, it is OK to connect it in series between the fan and the fan interface. Package includes: 1pc x CPU 4pin down-speed cable