Note that when inputting power, the positive and negative power must be connected correctly, otherwise the speed regulator burn out. "+" represents the positive pole, and "-" represents the negative pole. The product uses pulse width control frequency to achieve the speed of DC brushed motor. DC brushed motors are not divided into positive and negative, and the forward and reverse rotation of the motor can be achieved by switching two lines. Applicable matching motors: 550 775795 895 and DC brushed motors connected with two lines, DC reduction motors., Weight: 0.3968320716 Pounds, Manufacturer: Jaywool