ITEM NAME:6V 12V 24V 3A Adjustable Pulse Width PWM DC Motor Speed Regulator Controller Sw Descriptio n Descirption : 100% brand new and high quality. Control the speed of a DC motor with this controller. Convenient and easily use. High efficiency, high torque, low heat generating. With reverse polarity protection, high current protection. Specification : Input Voltage: DC6V - 28V Sustained current: 3A PWM Duty Cycle:5% -100% PWM Frequency:21khz Material: PCB + Electronic components Size (L*W*H): 50 x 29 x 16mm / 1.97"x 1.14"x 0.63"(approx) Cable length: Approx 200 mm / 7.88" Color: As the picture show Package Included : 1x PWM Motor Speed Controller Switch Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! Adjustable Regulator Pulse Width PWM DC Motor Speed Controller Switch 6V-28V 3A.PWM Duty Cycle:5% -100%. PWM Frequency:21khz. Sustained current: 3A. With reverse polarity protection, high current protection. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.