3 phase 120° brushless motor Waterproof design Functions: Mute when start Power cut brake Blockage protection Current limit protection Short circuit protection Avoid out of control 1:1 pedal assist function Undervoltage protection The Super mute function: Optimizing the design of motor and the control strategy, make the motor run with low noise, low oscillation and high output torque. Unique thermolysis function: With the advanced aluminium base heat technology to improve the effect of heat dissipation and the load flow of power component. Undervoltage current limiting function: Approaching the undervoltage, controller can lower the output current by itself to ensure the voltage above the undervoltage point, until the real voltage stop output. It can not only protect the battery effectively, but also increase the mileage. Package included: 1 X Brushless Motor Speed Controller.Please list your special requests color, packages, etc. Sincerely hope you do not leave us any negative or neutral feedback. Communication is very important, we believe we can resolve all the problem with each other. Welcome to visit our new store! We are a leading wholesaler and distributor of Tools & Workshop Equipment, Home Improvement, Kitchen, Dining & Bar Supplies, Auto Parts & Accessories etc. We will give you the best advise. We welcome to answer any questions you have.