[ performance]: The motor has strong climbing and low motor running noise, eliminating tire noise. [ of application]: Can drive sine wave motors, rectangular motors, and also suitable for Hall motors, can support 72V general, suitable for electric bicycles, electric . [Outstanding upgrade accessories]: motor has thicker copper , higher inductance accuracy, smoother starting, and more comfortable . [Exquisite workmanship]: products are professionally manufactured, with stable performance, increased shell thickness, and better heat dissipation. High reliability. The torques of the controller is increased, the power is strengthened, the speed can be faster, the smoothness of motor is better, and the life of the controller is . Colour:silver :composite Package Contents: 1 x controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.