Reversible Switch: This motor controller supports forward/reverse control and stop, could adjust the rotation direction which can reverse the direction of the motor, which is powerful and practical. High Quality Material: The speed controller is made of high quality PCB, high efficiency, large torque, low heat generation. which ensures a longer service life. Stable Performance: This simple and easy-to-use DC motor speed controller has an elegant appearance and stable performance. Power supply voltage: DC 12-60V, output current: 40A, installation size: 52 x 81mm. Adjustable: This DC motor speed controller supports precise and stable PWM speed control. Good heat dissipation: Our motor speed controllers have carefully designed housings to protect the control board from damage as well as heat dissipation.