Features: 100% Brand new & high quality In applications often need to adjust the rotation speed of the DC motor speed regulator. Our motor speed regulator use the PWM control technology, and own high efficiency, wide range of speed and stable performance characteristics. Regulators all use imported original semiconductor chip. And all are detected the voltage, current, functional range before delivery. The circuit is stable and reliable. Operating instruction: 1. Connect to the power, confirm the positive inversion switch located in the middle of the 0, and connected with a DC power supply(the DC supply voltage range is more than 6V and less than 30V).Warning: do not reverse the positive and negative terminals of DC power source, otherwise regulator may be damaged 2. Connected to the motor, the motor line can be positive or negative, when the running direction is not consistent with the expectative one , you can adjust the sequence of lines or switch position to change direction 3. Adjust the switch. Positive inversion switch is used to control the motor speed direction. When the switch is located on the 0 position, the motor stops rotating. 4. Adjust the potentiometer knob. Adjusting potentiometer knob can change output duty ratio of the regulator, then motor speed change Specifications: Model: CCM6N PWM Frequency:16KHZ The input voltage:6V-30VDC(wide range) The maximum output power: 200W (more than 24V) The maximum continuous output current : 10A(DC motor is recommended for use in 6A) PWM pulse width modulation range:0%-100% The potentiometer is used for speed regulation The positive inversion switch is used to control forward, reverse and stop Item size: 74 * 47 * 28mm Package includes: 1 x DC Motor speed Control PWM Controller .