Features Low Noise Operation: The DC speed controller features a synchronous rectifier converter design, resulting in glossy direct current output and minimal noise, eliminating the need for a heat sink under high current operation. Versatile Fan Support: Capable of accommodating all 12V 5A fans, including brushed DC motors, water pumps, and light bulbs, the speed controller allows multiple fans to operate in parallel without exceeding large currents. Manual Speed Adjustment: The speed controller can be manually adjusted using the onboard adjustable resistance, providing precise control over fan speed. 4 Temperature Zones: Equipped with 4 temperature zones for automatic temperature control and variable speed functionality, ensuring efficient and customizable cooling solutions. Work Monitoring Function: The speed controller includes a channel work monitoring function, supporting stop monitoring alarms and providing ble and visual alerts for speeds lower than 450 rpm. Specification: Item Type: DC Speed Controller Material: Plastic Working Parameters: 12V 5A Board Size: Approx. 50 x 48mm / 2.0 x 1.9in Package List: 1 x DC Speed Controller Note: Product with Temperature Probe and Buzzer, No Need to Purchase Separately Package List 1 x DC Speed Controller