ITEM NAME:Suit for 12V 4Pin Fan Aluminum 1 to 10 Channel Hub SATA Interface Power Splitter Everyone is a moon and has a dark side which he never shows to anybody..Design for 12V 4Pin Fan. PWM interface is connected to CPU FAN interface on motherboard by PWM cable, and the red interface is the dedicated interface for CPU fan. The black interface is a conventional PWM fan interface.