1 Electronic speed switch with a low loss, compact appearance, high power, wide control range and high sensitivity advantages. 2 Easy to adjust and control speed of PWM motor, simple wiring and convenient to use. 3 Red wire connected to the positive pole of power supply and motor, blue wire connected to the negative pole of motor and black wire connected to the negative pole of power supply. 4 Speed controller is made with high quality material, which ensures a longer service life. 5 Widely used for adjust motor speed, automobile fan heater control, defroster, fans speed regulation, etc.
What's in the box
1 x PWM Controller
