Feature: 1. Efficient Motor Control: Suitable for electric motorcycles and scooters up to 4000W. Offering stable sine wave control, it is less susceptible to fluctuations. The controller pairs exceptionally well with QS hub motors or QS mid drive motors. 2. Enhanced Performance: 450A phase current, 190A bus current. This controller is capable of effectively controlling the motor, there will be a noticeable acceleration and enhancement in the motor, effectively increasing its power. 3. Waterproof Design: IP67 waterproof rating for all weather use, ensuring undisturbed performance no matter the weather condition, bringing you professional and stable results. 4. Smooth and Precise Control: For Hall sensor technology used in the controller guarantees smooth and accurate motor control, delivering an effortless driving experience. 5. Battery Protection: The motor controller not only protects the battery but also extends its lifespan. Additionally, it helps increase the driving distance of your electric motorcycle. Specification: Item Type: Electric Motorcycle Brushless DC ControllerMaterial: ABSModel: ND84450Voltage: 84vPhase Current: 450A Bus Current: 190A Number of Mosfet: 24 Waterproof Rating: IP67 Sensor Type: For Hall Sensor Applicable Motor Power: Equal to or less than 4000w (this value is the normal matching value, if you are not pursuing torsion and top speed, and can go up one power band) Applicable for Electric Motorcycle, Electric Scooter, Brushless DC Driver. Package List: 1 x Controller 1 x Wiring Harness Note: The controller is a sine wave controller, which is a brushless DC controller with self learning function. Generally speaking, it matches well with QS motors. If you want to match it with a new brand motor, some parameters need to be tested by yourself.