Two operating speed modes for flexible control The speed regulation mode supports two working modes: temperature adjustable mode and temperature fixed mode. Switch between them by flipping the mechanical switch on the board. Automatic, energyefficient cooling Automatically adjusts fan speed and air volume based on detected temperature. Provides fully automatic linear stepless speed regulation for smooth, continuous control. Helps save energy and reduces noise without compromising cooling performance. Wide compatibility and drive capability Wide voltage design supports 12V or 24V systems. Compatible with 2/3/4 wire fan or motor connections. Maximum driving current: 4A. Dualfan support Can control two fans simultaneously, enabling coordinated cooling for compact systems or enclosures. What you get and how it helps Function: Precise, adaptive fan control that responds to temperature and user mode choice. Compatibility: Works with a range of 12V/24V fans and motors using common 2/3/4 wire connections. Performance: Smooth, linear speed adjustment that reduces noise while maintaining effective cooling. Reliability: Mechanical switch on the board provides a clear, durable mode selection. 23 practical use scenarios computer cooling: Automatically modulates case fans in response to CPU/GPU temperatures for quiet operation during light use and adequate cooling during heavy workloads. 3D printer enclosure: Maintains stable enclosure temperatures with automatic fan regulation; switch to fixed mode when a constant airflow is required for specific materials or print environments. Small server or NAS enclosure: Manages two cooling fans to keep internal temperatures within safe limits while minimizing fan noise during low load. Setup and compatibility notes Mode switching is performed by the mechanical switch on the board. Designed to work with 12V or 24V systems and supports common 2/3/4 wire fan or motor configurations. Capable of driving up to 4A and handling two fans at once for coordinated cooling performance.