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

[4 PIN COMPATIBILITY] Built to control standard 4 wire chassis fans and CPU fans with true PWM speed regulation. A practical choice for PC cooling upgrades that need stable and precise fan response. [THERMOSTAT CONTROL] Set temperature accurately and let the module adjust fan speed automatically. Below the acceleration point it runs at minimum speed and above full temperature it outputs full speed. [MANUAL AUTO MODES] Combines manual speed regulation with automatic temperature based control, giving PC users flexible cooling management for daily work gaming systems and compact DIY builds. [ALARM PROTECTION] If a connected fan on the corresponding channel fails the controller triggers sound and light alarm with the included buzzer. The warning clears automatically when fan rotation recovers. [COMPACT 12V DESIGN] Operates on DC12V and fits tight spaces with an approx. 5.3 x 4.5cm board size. Includes 3mm mounting holes plus a probe and buzzer for convenient PC case installation.