Features: This is a simple and easy-to-use DCed brushed motor speed controller, DCed motor speed controller is connect to DCed power supply. Designed with convenient screw terminals for quick wire connection. Working Voltage: DCed 6-28V, Maximums continuous output current : 3A, Maximums output power: 80W. This motor speed controller would change direction of rotations that accomplishes reversing motor's direction. Simply rotate the knob to change output so to change the revolving speed of brushed motor. Specifications: Color:Black Material:Plastic Size:Approx.3.2x5x1.5cm/1.25x1.96x0.59in Quantity:1pc Package Includes: 1x Motor Speed Controller note: Please allow little error on the size due to manual measurement. The color might exist slightly difference due to different displays.