Sunshine-tipway Pc 5.25 Inch Drive Bay Full Brushed Aluminum 4 Channel PWM Fan Controller with LCD Screen Manual and automaic fan speed adjustment ,reducing resonanced noise,shows the actual speed of each fan,general fan interface 3pin/4pin With large LCD screen and ultra-wide viewing angle,full aluminum panel to create top-level texture The fan controller can support a maximum of 30w fan ,voltage range 5.6-12v Using patented thermal desgin,the operating tempreature below 38 degrees Each fan working speed range is 600-480, and PWM line speed adjustment can effectively reduce high frequency noise.