Precise Speed Control: Our motor speed controllers control the speed of DC motors by adjusting pulse width modulation (PWM), provide accurate and adjustable speed control for a variety of motors and help you achieve the best speed for your specific purpose..It has an LED display; a potentiometer knob and a front brake-reverse switch.<br> Widely used: The adjustable voltage range is truly smooth and can be adjusted from 10V to 55V.The DC motor driver can brush motor speed and dimming adjustments in the DC circuit.Note: Electric vehicles cannot be used.<br> High Quality Material: The motor speed controller is placed safely in a sturdy aluminum box, durable and protects it from injury.Additionally, the holes on the sides and top of the box help it stay cool and ensure it runs well.<br> Input voltage: DC 10-55V;<br> Output voltage: linearity under load;<br> Input current: 60A;<br> Rated current: 40A;<br> Speed range: 0-100%;<br> Speed type: Regulating current;<br> PWM frequency: 15KHZ;<br> Potentiometer:Linear;<br> Wiring type: Terminal;<br> Colour:As Shown<br> Material:Metal<br> Package Contents:<br> 1pcs x pwm controller<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.