Capable of expanding one motherboard PWM fan header to support up to five fans. Support PWM function, speed control, satisfy your control needs. Compatible with 3-pin/ 4-pin fans. (Due to 3 pins no PWM controller, 3-pin fans would run in full speed.) Support cable management. Comes with self-stick for easy installation and options to hide the PCB itself. Since only one RPM signal can be read by one motherboard connector, only CPU fan channel of the PWM splitter carries an RPM signal. Thus the motherboard will only read the RPM signal of the PWM device that is connected to channel 1 of the splitter. Type: Cooling Fan Hub Material: Nylon + Plastic + Metal Connector A: 1-TX4 4-pin Female Connector B: 1-TX4 4-pin Male for CPU Fan, 4-TX4 4-pin Male for Case Fan Voltage: DC 12V Features: Plug& play, 5-Port, Good Performance Length: 39.5cm/15.55" (Approx.) Notes: PWM capable connectors must necessarily be 4-pin, but not all 4-pin motherboard connectors implement or enable the PWM signal modulation by default. This is only a fan hub, not fan speed controller. Only 4-pin PWM fans speed can be adjusted by fan controller software. 3-pin fan would run in full speed, can not be adjusted when connected. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 3 x 1 x Cooling Fan Hub