Product Name: ZW40Input voltage: DC9-55VOutput voltage: linear under loadOutput current: 0-40AContinuous power: 2000WSpeed regulation type: regulatingSpeed regulation: potentiometer (linear)Speed range: 0 - 100%Control frequency: 25KHZWiring type: barrier terminalKnob specification: 100K (148)Module size: 83x56x28mm/3.26x2.2x1.1inchMain board size: 72x48mm/2.83inchPotentiometer press open: 7mm/0.27inchColour: as shownMaterial: PC+metalPackage Contents:1 * Motor Speed ControllerOnly the above package content, other products are not included.Note: Light shooting 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.