Well design case can protect the controller board from damage as well as dissipate heat. High efficiency, high torque, high performance, high heat dissipation. A good speed controller for DC motors. Universal DC motor speed controller, the input voltage can be DC 10V to 55V Note: The digital display for the motor full speed percentage 0-100 non-motor actual speedInput voltage: DC10V 55V Output voltage: linear with load Max. current: 60 A. Continuous current: 40 A. Speed range: 0% to 100% Forward backward: support Control method: potentiometer (linear). Control type: control current. Control frequency: 15 kHz. Wiring Type: Screw Terminal Rotary knob: 100 K (with switch). Suitable for: brushed DC motor Size: 128 x 98 x 40 mm Packaging includes: 1 x Speed controller