1ADJUSTABLE SPEED: The 12W violent fan adopt an all black acrylic shell, can be used to drive 12V server violent cooling fans, and the wind speed is adjustable from 0 to 100 percent 2POWER INPUTS: Powerful fan control module has two power input interfaces: 5.5x2.1 conventional power socket(12V input) and Type C interface(5V input, power bank can be used) 3WIDELY USED: Stepless powerful fan control module can be used for heat dissipation, blow air, tin welding, smoke exhaust and so on, very versatile 4EASY TO ADJUST: Turn the adjustment potentiometer of powerful fan controller, and the wind speed will change with the potentiometer, flexible and sensitive 5STRONG AND POWERFUL: Violent fan control module has strong wind, support stepless speed adjustable, bring rapid heat dissipation, provide great convenience for your life 1 x Powerful Fan Control Module