The current of this motor speed controller can be adjusted from 1A to 10A, and it is simple to set. The positive and negative pole of motor can be connected one way or another. The regulator's robust construction and overload protection via SEFUSE ensure reliable performance and safety, making it a trusted component... Adhere to the best product quality and the most intimate service, with this brand conception, we strive for perfection in every process of each product, selecting high-quality materials from the beginning, and then keep improving the product quality via utilizing innovative technology. Exchange the pole when the rotation direction is not as expected, exchange the pole. Upgraded DC PWM Motor Speed Controller 12V 24V 36V 15A 12v Motor Speed Controller Buy QWORK® DC Motor Speed Controller With Overload Protector 12V 24V Pwm Controller There is a knob, you can rotate it to change output so to change the revolving speed of motor, convenient and easy to use. Lifewit 1500 Pieces Rotating Puzzle Board with 4 Drawers, Tilt Angle, Puzzle Tray, Portable Puzzle Table with Carry Handle, 35x27 Inch, Easel Puzzle for Kids Suitable for motors of which voltage is 12V with power less than 120W and that is 24V with power less than 200W.