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- 12V 4-Pin PWM Control: Only compatible with 4-pin PWM fan interfaces to control 12V fan speed and enable automatic temperature-based airflow adjustment. - Dual Digital Display: Shows fan speed (displayed as x100 RPM) and ambient temperature in Celsius with dedicated indicators for each mode. - Simple Setup Buttons: Use OK + - to adjust fan speed and set thresholds in sequence—Acceleration Temperature L**, Full Speed Temperature H**, Off Temperature C**; press OK to save and exit. - Auto or Manual Modes: Precise PWM speed control with automatic temperature response or manual fine-tuning to meet different cooling needs. - Versatile Use: Suitable for computer cooling, power supply cooling, and electronic device fan control while keeping operation status easy to monitor.