20A Forward And Reverse DC Speed Regulator 9-60V Pulse Wide Motor Driver PWM Control Board 1. Reverse connection protection, positive and negative poles connected to the wrong not work, can well protect the governor 2. Fixed mounting lugs, easy installation 3. Working voltage: DC 9V-60V 4. Output voltage: linear under load 5. Continuous current: 18A 6. Control current: 0-20A 7. Speed regulation range: 0 percent - 100 percent 8. Speed regulation mode: potentiometer 9. Forward and reverse: support 10. Speed regulation principle: flow regulation 11. Wiring mode: - Red wire connection: power supply positive + - Black wire connection: power negative - - Blue wire connection: motor positive + - Green wire connection: motor negative - 12. Potentiometer opening: 7mm 13. Mounting hole center distance: approx. 10.4cm 14. Dimensions: approx. 9.2 x 5.2 x 3.6cm 15. Weight: approx. 155g 16. Note: do not switch to the other direction while running at high speed, not for use on electric vehicles, not for use on geared motors