DC9-50V 40A DC Motor Speed Control Reversible PWM Control Forward Reverse Switch

DC 12 - 60V 40A PWM Brush Motor Speed Controller Speed Switch Forward Reversible

DC Motor Speed Controller Reversible PWM HHO Reversing Control Switch 12/24V 40V

PWM DC 6V-24V Motor Speed Controller Regulator Reversible Forward Reverse Switch

12V 24V 36V 40A Forward & Reverse PWM DC Motor Speed Controller with tachometer

2X DC Motor Speed Controller Reversible PWM Reversing Control Switch 12/24V 40V