40A high power forward and reverse speed regulator.Positive and negative polarity relay switching built-in 2 80A high current relaysTechnical Parameters: Model: DC10V-50V DC speed regulatorOperating voltage: 10V-50VOutput voltage: linear under loadMaximum current: 60AContinuous current: 40ASpeed adjustment range: 0%--100%Forward and reverse: YesSpeed adjustment : potentiometer (with switch)Speed regulation type: flow regulationMaterial: metal+abscolour: As ShownPackage Contents: 1 x Motor speed regulatorOnly 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.