Feature:1. Wide Compatibility: Brushless DC controller is suitable for electric motorcycle mobility scooter 4000W, compatible with QS hub motor or QS mid drive motor.2. Speed Controller Performance: Rated at 72V and 350A phase current, providing up to 105km/h speed and optimized performance for electric scooters and mobility scooters.3. Self Learning Function: The brushless DC controller is equipped with self learning function for excellent commonality, high performance, ensuring long term stable use.4. Sine Wave Controller: This controller is sine wave type controller, stable and efficient control, ensuring smooth operation and improved driving experience.5. Enhanced Motor Power: The motor speed and power can be significantly increased, providing better performance. It protects the battery and extends battery life, and it can also increase the driving distance.Specification:Item Type: Brushless DC Motor ControllerMaterial: Metal + ABSModel: DK72350Rated Voltage: 72V (36-100V, The default value is 72V)Bus Current: 85-120APhase Current: 350ASpeed: 105km/h (The specific speed needs to be combined with vehicle weight and wind resistance)Fitment: Fit for QS Motor Electric motorcycle mobility scooter 4000W.Package List:1 x Controller1 x Wiring5 x ScrewsNote:Professional installation is highly recommended!