Features: The motor speed controller is designing with digital display screen that shows the percentage of actual speed to largest speed for precise control. Panel type press fit design, supporting a wide voltages ranging from DC6V to DC60V, with a large current capacity. The PWM speed controller adopts screw terminals, easy to connection and use. Quality circuit board materials, good durability and wear resistance, ensuring long time use. The adjustable motor controller is equipped with instantaneous start/stop switches and a speed control potentiometer for convenience. Specifications: Material: Plastic+Metal Size: approx. 9.5x6x3.2cm/3.74x2.36x1.26inch Input: DC6-60V Output current: 0-30A Continuous current: within 20A Speed regulation type: current regulation Speed regulation method: potentiometer Control frequency: 15KHZ Wiring type: lock the wiring terminals Knob cable length: 18cm Speed digital display: percentage 0-100 Package Includes: 1 Piece DC6-60V PWM Motor Speed Controller note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.