It is a reversible PWM DC motor controller, the inner metal wires are well wrapped by and heat resistant cables. Please note that the DC motor controller to the DC power supply, never connect to household 220V power directly, otherwise the damage is at your own risk! Features - Brand: WINOMO. - ColorBlack - Material: Metal. - Size: 5.00X3.20X1.50cm/1.97X1.26X0.59in. - The DC input voltage range is from 6V to 24V, less than 3A output . - It used for DC motor regulation and dimming. - Pulse width modulation (PWM) with wide/variable has the advantage of making full use of the energy of the power supply, and the circuit is efficient. - The motor can be divided into positive and negative. When the running direction is inconsistent with the expectation, the direction can be changed by adjusting sequence. - Does exactly what it's supposed to do - reverse a DC motor and control speed. No more hesitation! Package list: 1 x WINOMO PWM DC Motor Controller