4 Wire Fan Speed Regulator PWM Speed Controller DC 12-24V 1.5A Dual Channel LED Display Reverse Polarity Protection

Product Features1. Using PWM technology, this speed regulator enables precise control of fan speed2. Supports simultaneous connection of two 4-wire fans, allowing synchronized control of both fans3. Users can manually adjust fan speed and set their own speed levels4. Includes a reverse connection protection circuit to effectively prevent damage from incorrect wiring5. Real-time LED status display; the faster the speed adjustment, the brighter the lightProduct DescriptionThis module is specifically designed for standard Intel 4-wire fans and outputs a pure PWM speed control signal. Fans must have their own speed control circuitry; 2-wire and 3-wire fans are not compatible. Unlike PWM speed control via the power supply, this method avoids abnormal noise and stuttering caused by intermittent power supply, ensuring smoother fan operation. The blue and black wires are the speed control terminals (corresponding to pins 1–4): shorting them sets the minimum speed, while leaving them unconnected sets the maximum speed. This module is compatible only with standard Intel 4-wire fans.Product SpecificationsOperating Voltage: DC 12–24VAdjustment Method: PotentiometerMaximum Output Current: 1.5AOutput Frequency: 15 kHz, Duty Cycle 10–100%Package ContentsFan Speed Controller × 1