Features:
The DC motor speed controller can control the direction of  DC motor, CW/CCW rotation

This motor controller board can adjust the speed of the motor by the speed control knob

With emergency stop button, safe to use
This speed controller support  6-30V voltage,and suitable for 37GB3525 brushless motor
The motor speed controller has speed control knob, easy to operate

Specifications:

Voltage: DC 6-30V
Size: 6.6*3.2cm/2.6*1.26in
Weight: 17g

Package includes:
1 x Motor Speed Controller

Note:
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.