Expand 4-pin fan interfaces, solving the problem of lack of motherboard fan interfaces. Designed for 12V 4-Pin 3-Pin fans, support simultaneous starting at most 10 channel fans. In the hub interfaces, the RED CPU interface is the CPU fan dedicated interface (with speed detection function). Since the mainboard can only receive one rotation speed signal, the remaining nine conventional fan interfaces have the PWM function, but no speed signal. For both 4-Pin and 3-Pin fans. Please note 4Pin fan speed can be adjusted by temperature control. 3Pin fan can also be used, but because 3Pin has no PWM function, it is at fixed speed after inserting. There is EVA double-sided adhesive at the back of the hub, which can be easily affixed to a flat place. Also a fixing screw hole in the middle of the PCB to facilitate fixing to a part of the chassis. RED is expected to be a pass through for the CPU fan. So, the hub has a power source fed from the computer power supply, then the speed is regulated by the speed for the "source" fan. You can connect to the CPU fan lead on the system board or the chassis fan lead. The ten fans will spin at the same speed, that designated by the system for that fan. If the chassis fan is configured in BIOS to run at 50%, you will have 10 fans at 50%. Type: 4Pin IDE Molex 1 to 10 way cooling fan splitter hub Input Interface: 4Pin IDE Molex Output Interface: 10 way fan 12V 4pin interface port, support simultaneous starting of 10 channel 4-Pin fans, solving the problem of shortage of motherboard. The Red interface is the dedicated interface for CPU fan, and the other black interfaces are conventional PWM fan interface. PWM Interface: For connecting to CPU FAN interface, which support PWM function, on motherboard with connection cable. Function: Support PWM function fan automatic speed regulation. Installation: With EVA double-sided adhesive on the back, you can fix the hub in the chassis. Application: Widely used for PC computer water cooling system. Colour:black Material:Plastic + Metal Size:7.4 x 4.8cm Package Contents: 1 x 4 Pin IDE Molex 10 port cooling fan splitter hub 1 x 4 Pin PWM Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.