HIGH QUALITY - The speed controller is made of high quality printed circuit board which ensures longer service life. STABLE PERFORMANCE - High efficiency, high torque, high power, high heat dissipation. A good speed controller for DC motors. INPUT VOLTAGE - Universal DC motor speed regulator, input voltage can be from 10V to 55V DC REVERSIBLE ENGINE CONTROLLER - This motor speed controller allows you to set the direction of rotation that allows you to reverse the direction of the motor. Motor speed controller is simple in appearance, stable in performance and small size 100 x 76 x 28 mm / 3.93 x 2.99 x 1.1 inches. It can be efficiently and conveniently used in childrens toys to replace damaged electrical control accessories.