Computer System Cooling Parts features: 1 to 10 PWM 4 Pin Cooler Fan Hub Splitter Adapter Cable by 12V SATA Power Supply Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. 10 Ports 4pin PWM fan hub power splitter Compatible with 3-pin/ 4-pin PWM function for 4pin PWM fans, spin at the same speed using PWM controller full speed run for 3pin fans Features: It is designed for enthusiasts with need for controlling numerous system fans Capable of expanding one motherboard PWM fan header to support up to ten fans. 10 Ports PWM header are powered by the Molex LP4 4pin connector from computer PSU Support PWM Funciton, Speed control, satisfy your control needs. Compatible with 3-pin / 4-pin Fans (Due 3pins no PWM controller, 3pin fans would run in full speed. ) 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.