Features: Speed controller is made with high quality circuit board which ensures a service life.This simple and easy-to-use DC motor speed controller has an stable performance.The output current of this motor speed controller can be adjusted from 0A to 30A, and it is simple to set.Designed with a digital display that shows the rate in percent of actual speed to maximum speed. This motor speed controller uses screw terminals for convenient and quick wiring.The positive and negative pole of controller must be connected correctly, otherwise, the item might be burnt. The input voltage of controller is better to be same as rated voltage of motor.Product parameters:Input voltage: DC6-60VOutput voltage: linear under loadOutput current: 0-30AContinuous current: 20ASpeed control type: flow adjustmentSpeed control mode: potentiometerSpeed range: 0 -Control frequency: 15KHZWiring type: fence terminal blockKnob line length: 15CMModule size: 75MM x 56MM x 28MMNote:the digital display is the percentage non-motor actual speedMaterial: PCBcolour: greenPackage Contents:1 x DC motor speed controllerOnly the above package content, other products are not included.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.