Feature:1. Enhanced Motor Control: The electric motor controller could effectively manages motor performance, speed, and effectively increasing motor power.2. Premium Material Construction: This brushless DC motor controller is made of solid materials resistant to high temperatures, ensuring long time stable use.3. Stable Sine Wave Control: The electric motor controller features stable sine wave control, limiting susceptibility to fluctuations, perfect match with for QS hub motors or for QS mid drive motors.4. Fine Workmanship: The controller is professionally manufactured with meticulous workmanship, boasting a unique design that ensures stable performance and high reliability.5. Battery Safeguard and Enhance Longevity: The controller is designed to protect the battery and extend its life, additionally, enhances driving distance.6. Self Learning Function: This brushless DC controller comes with a self learning function, making it versatile and adaptable to different motor settings.Specification:Item Type: Brushless DC Motor ControllerMaterial: Metal, ABSModel: DK72550TVoltage: 72v default (36-100V)Bus Current: 180/280APhase Current: 550ASpeed: Approx. 130km/h (The exact speed needs to be combined with the weight of the vehicle and wind resistance)BT: Built inFitment: Fits for QS Motor Electric motorcycle mobility scooter8000W.Package List:1 x Motor1 x Terminal Cover1 x Wiring5 x ScrewNote:Installation by a professional mechanic is highly recommended