1、4 Pin Fan Connector: Extend the 4 pin fan connector to solve the problem of insufficient fan connectors on the motherboard. Designed for 12V 4 pin and 3 pin fans, it supports up to 10 fans to start at the same time. 2、PWM Function: Among the chassis fan hub interfaces, the RED CPU interface is dedicated for CPU fan (with RPM detection), and since the motherboard can only receive one RPM signal, the rest of the 9 regular fan interfaces come with PWM function and no RPM signal. 3、Speed Control: For 4 pin and 3 pin fans. Please note that the 4 pin fan speed can be adjusted by temperature control. 3 pin fans can also be used, but since 3 pin does not have PWM function, the speed is fixed when plugged in. 4、Equipped With PWM Cable: This PC chassis fan hub is equipped with a 40cm/15.7in length PWM cable, which can support back wiring. After the PWM cable is connected to the motherboard, the temperature control and speed can be controlled through the motherboard. 5、Easy To Install: The CPU cooling fan hub is fixed with adhesive, which can make the hub work well and fixed on the chassis, providing stable and reliable performance for long lasting use.