?This DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM). It's ideal for applications like fans£¬ etc. providing nice adjustment of motor speed. <br><br><strong>Features:</strong> <br>Operating voltage: 10V 12V 24V 30V£¬ max. power: 120W. <br>A PWM speed controller£¬ enables you to control the speed of DC motors smoothly. <br>PWM pulse width modulation range: 5% -95%. <br>High-quality potentiometer for speed adjustment£¬ stable performance. <br>With reversing switch and indicator; high efficiency and low noise. <br>Suitable for applications like fans£¬ etc. providing nice adjustment of motor speed. <br><br><strong>Notice:</strong> <br>1. This speed controller is applicable to DC motor; it can't be be connected with DC voltage(e.g. 220V AC). <br>2. Potentiometer knob can change the output duty cycle of controller and then change the motor speed. <br><br><strong>Specifications:</strong> <br>Working Voltage: DC 10V-30V <br>Rated Current: 3A <br>Max. Current: 4A <br>Short circle time is less than 30 seconds? <br>Max. Power: 120W <br>PWM Pulse Width Modulation Range: 5% -95%? <br>PCB Board Size: 72 * 45mm / 2.83 * 1.77in <br>Product Weight: 68g / 2.4oz <br><br><strong>Package List:</strong> <br>1 * DC Motor Speed Controller