Features: <br>The DC motor speed controller can control the direction of DC motor, CW/CCW rotation <br> <br>This motor controller board can adjust the speed of the motor by the speed control knob <br> <br>With emergency stop button, safe to use <br>This speed controller support 6-30V voltage,and suitable for 37GB3525 brushless motor <br>The motor speed controller has speed control knob, easy to operate <br> <br> <br>Specifications: <br>Voltage: DC 6-30V <br>Size: 6.6*3.2cm/2.6*1.26in <br>Weight: 17g <br> <br> <br>Package includes: <br>1 x Motor Speed Controller <br> <br> <br> <br> <br>Note: <br>The controller is NOT reverse-polarity protected and will be damaged if connect the supply voltage with wrong polarity. Double check all connections before applying power and always turn off the power supply before making any wiring changes.<br>1、The DC motor speed controller can control the direction of DC motor, CW/CCW rotation <br>2、This motor controller board can adjust the speed of the motor <br>3、This speed controller support 6-30V voltage,and suitable for brushless 37GB3525 motor <br>4、With speed control knob, easy to operate <br>5、The motor speed controller has speed control knob, easy to operate