This DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM). Large 0.56 inch 3-digit LED display numbers allow viewing under the most adverse conditions.? <br><br><strong>Features:</strong> <br>Large 0.56 inch 3-digit LED display numbers for easier readings. <br>A PWM speed controller￡? enables you to control the speed of DC motors smoothly. <br>Wide range of working voltage: DC 6V-30V. <br>The rotary knob can realize 0-100% adjustment￡? and display 0-100 on the screen. <br>With case for better durability; 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. The anode and the cathode of DC power cannot be connected reversely￡? otherwise the controller will be damaged. <br>3. When running direction is inconsistent with your desire￡? you can change it by adjusting the linear order. <br>4. 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 6V-30V <br>Rated Current: 6A <br>Max. Current: 8A <br>Control Power: 6V*6A=36W￡? 12V*6A=72W￡?......30V*6A=180W <br>PWM Frequency: 16KHz? <br>Duty Cycle Adjustable: 0%-100% <br>Item Size: 79 * 42 * 24mm / 3.11 * 1.65 * 0.94in <br>Item Weight: 58g / 2.04oz <br><br><strong>Package List:</strong> <br>1 * DC Motor Speed Controller <br>