9-60V PWM DC Motor Speed Controller Switch 20A Variable Speed Regulator Governor Switch with Speed Control Knob

9-60V PWM DC motor speed controller switch 20A, variable speed regulator governor switch with speed control knob Specification: Work voltage: DC 9V - 60V Control power: recommended within 12V 300W within 24V 400W within 48V 450W Max power: 1200W Max current: 20A Duty cycle adjustable: 0 to 100% PWM frequency: 12 KHZ Module size: 3.40 x 2.30 x 1.40 inch Packages: 1 x DC motor speed controller Warm tip: 1. DC power supply polarity can not be inversed, otherwise may destroy speeder. 2. If need the forward and reverse function, customer can connect the positive and negative switch. 3. Only suitable for DC motor speed control, not for AC power supply. 4. This product is DC brush motor speed controller, can not access AC power and drive brushless motor.