Dianrui 3PCS Black 12V/24V DC Motor Speed Controller Universal Switch,Electronic Stepless 12v Fan Speed Controller with Rotary Switches Fit for Automobile Fan Heater Control
Features: The motor speed can be adjusted and controlled, the wiring is simple, and it is easy to use, and it has a heat dissipation device, which can make the motor dissipate heat better. Suitable for automobile fan heater, defroster, motor speed adjustment, etc.
Usage: Blue wire is connected to the negative pole of the motor, red wire is connected to the positive pole of the motor and black wire is connected to the negative pole of the power supply.