PWM Fan Speed Controller, DC 12V Four Wire Thermostat Controller Governor Module for PC (mainboard + small speaker probe)

Accurate temperature setting and precise control, Operating voltage: DC12V When the temperature lower than the accelerated temperature, then output at the minimum rotation speed; when it exceed over the full temperature, then always output at full speed The controller only controls the speed of the all standard four-wire chassis fan and CPU fan for Board Size: Approx. 5.3×4.5cm/2×1.7inch,Positioning Hole Position: 44×37mm/1.7×1.5inch, Positioning Hole Diameter: 3mm. It integrates manual speed regulation and automatic temperature control and speed regulation function When the corresponding open channel fan break down, the controller will alarm with sound and light (works with buzzle), alarm will automatically eliminated when the fan is rotated recovery