Feature: 1. Potentiometer Adjustment: This DC motor speed controller can adjust the motor speed by potentiometer, the adjustment range is 0% to 100%. 2. Pulse Width Modulation: This DC motor speed controller uses the pulse width modulation (PWM) method for dimming h or speed regulation, which makes full use of the power supply's energy and the circuit is highly efficient. 3. Rotary Switch: This DC motor governor uses a rotary switch, short press the knob to turn it on, the decimal point lights up after the third digit, it stops and the decimal point disappears. 4. Delayed Start And Stop: This DC motor governor has delayed pneumatic and stop function, long press the knob to enter the parameter setting interface display C, set the slow start and stop time is 1 to 10 seconds. 5. Wide Application: This DC motor speed controller is widely used for powering small power motors, electric motors, fans, water pumps, hand drills, LED lights, stereos, amplifiers and other DC products. Specification: Item Type: DC Motor Speed Controller Material: ABS Plug: US Plug AC110-230V Output Voltage: DC12V Maximum Output Current: 3A Adjustment Range: 0-100%. Package List: 1 x DC Motor Speed Controller Note: This motor cannot be used in electric vehicles.