DeepCool Fan FH-04 Hub control 4PWM fan speed supports fan with 3pin/4pin. FH-04 enables users to greatly expand cooling capability within the chassis and enjoy enhanced system performance. FH-04 is able to extend up to 4 fans and compatible with 3-pin/4-pin fans. Each port has its own PWM function and the fan speed can be adjusted at the same time, but only the speed of fan 1 can be identified by the system. Support PWM function. 4-Port fan hub. Compatible with 3-pin/4-pin fans. Support Cable management. Double-sided adhesive Installation.