PWM 5A 90W DC Motor Speed Controller 4.5V-35V Speed Controller with Knob Adjustable Speed Regulator
PWM 2A 30W Low Voltage DC Motor Speed Controller 1803BK Adjustable Drive Switch 1.8v-12v Motor Controller
PWM 10A 400W DC Motor Speed Controller 12V to 40V Speed Controller with Knob Adjustable Speed Regulator