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 Controller Material: Metal + ABS Model: DK72350 Rated Voltage: 72V (36-100V, The default value is 72V) Bus Current: 85-120A Phase Current: 350A Speed: 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 Controller 1 x Wiring 5 x Screws Note: Professional installation is highly recommended!