Feature: 1. Applicable Model: The brushless DC motor speed controller is applicable for QS Motor Electric Motorcycle Mobility Scooter with power up to 10000W. 2. Stable Sine Wave Controller: Features a sine wave controller design that provides consistent efficiency without fluctuation, perfect match for QS hub motors or QS mid drive motors. 3. Effective Motor Control for Enhanced Speed: This controller significantly enhances the motor's speed, effectively boosting the motor's power once replaced. 4. Extended Lifespan: With added self learning function offers excellent commonality and allows for easy calibration to other motors, extends battery lifespan and driving distance. 5. Premium Material for High Durability: Made from premium materials that withstand high temperatures and corrosion, ensuring a long lasting stable operation. Specification: Item Type: Brushless DC Motor Controller Rated Voltage: 72V Bus Current: 300A/400A Phase Current: 690A Speed: 150km/h Maximum Input Current: 300A±6A Under Voltage Protection Value: 0.875xVCC±1V Motor Control Mode: FOC Motor Hall Type: 120 degrees/60 degrees Brake Mode: High (12V)/Low Level Under Voltage Protection: 62-64V Over Voltage Protection: 91-93V Rated Power: 8640W Peak Power: 21600W Limiting Current: 294-306A Hall Supply Voltage: 4.3V Operating Temperature: -20-60°C Fitment: Fits for QS Motor Electric motorcycle mobility scooter up to 10000W. Package List: 1 x Controller 1 x Cover 1 x Wiring 5 x Screw Note: Highly recommended for professional installations, (wiring has corresponding functional instructions)