We offer discount for large quantity. Welcome to contact with us! _x000D_ The DC motor speed controller allows the use of pulse width modulation (PWM) DC voltage and a fully adjustable positive DC and negative DC output with a duty cycle between 0% and 100% to control the speed and direction of the DC motor _x000D_ The circuit also includes LEDs whose brightness varies in proportion to the relative speed of the motor, so _x000D_ Provide visual feedback of current speed. _x000D_ _x000D_ Overload and short circuit protection current is 10A _x000D_ PWM frequency: 16kHz _x000D_ Adjustable duty cycle: 0-100% _x000D_ Power-on LED indicator _x000D_ Working environment temperature: -20-40 _x000D_ The forward and reverse switch is used to control the direction and stop of the motor. _x000D_ Speed can be adjusted by external 0-5V signal _x000D_ Note: This cannot be used for brushless motors. _x000D_ The controller does not have reverse polarity protection. If you connect the power supply with the wrong polarity, the controller will be damaged. _x000D_ Before turning on the power, check all connections carefully and always turn off the power before changing any wiring. _x000D_ Material:plastic _x000D_ colour:green _x000D_ _x000D_ Package Contents: _x000D_ 1 x 6 - 30V 6A DC Motor Speed Controller _x000D_ _x000D_ Only the above package content, other products are not included. _x000D_ Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_