Features: Brand new and high quality. Control the speed of amotor with this controller. High efficiency high torque low heat generating. With reverse polarity protection high current protection. Working Voltage: DC 12V - DC 40V. Control Power:0.01 - 400W. Static Current:0.02 A ( Standby ). PWM Duty Cycle:10% -100%. PWM Frequency:13 KHz. Material: Plastic metal. Specification: Original box: no Item size: 60*56*27mm Net weight: 78g Packaging weight: 87g Package Included: 1 xMotor Speed Control Switch