Description Input voltage: DC 9-55V Output voltage: load linear Output current: 0-40A Continuous power: 2000W Speed regulating type: current adjust Mode of speed regulation: potentiometer (linear) Speed range: 0 - 100% Control frequency: 25KHZ Type of wiring: terminal Knob specification: 100K (148) colour:green Material:plastic size:Module size: (L x W x H) 83 x 56 x 28mm The main board is according to the size: (L x W) 72 x 48mm The potentiometer is installed by the opening: 7mm Package Contents: 1 x DC motor pump speed regulator Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.