Function: through this hub, the governor can supply power to up to 8 fans, and the rotating potentiometer can adjust the speed of 8 PWM fans at the same time. Note: the fan base supports 3 pin and 4pin fans, If the fan does not support PWM speed regulation function, the speed regulation function is invalid. The current conneted to the fan shall not the maximum current value of 17A. Installation : the adhesive pad at the bottom of the marshalling governor can be bonded in the chassis for fixation. fan PWM HUB speed controller Product size:42 x 29 x 20mm Weight:12g Supply :DC12V Power supply interface:6pin(2*3)interface Max current:17A Number of fan seats: 8PCS size: 42 x 29 x 20mm Material: ABS colour: black Package Contents: 1 set x Computer Case Fans Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.