Feature: 1. ENHANCED PERFORMANCE: Effectively enhances motor speed and power, providing a noticeable boost in performance after replacement, suitable for motors up to 10000W. 2. STABLE SINE WAVE CONTROLLER: The controller incorporates a sinewave control mechanism, ensuring stable performance and minimizing fluctuations. Perfect match for QS hub motors or mid drive motors. 3. STRONG COMPATIBILITY: Equipped with self learning ability, providing easy pairing with QS motors and compatibility with new brands after a simple parameter setting. 4. EXCEPTIONAL BATTERY GUARD: The controller not only protects the battery, but also extends battery life and enhances driving distance, making it an ideal power manager for your electric motorcycle. 5. LONG LASTING DURABILITY: Made from high strength ABS, metal materials, this controller withstands high temperatures and wear, ensuring durability and long term stable use. Specification: Item Type: Brushless DC Motor Controller Model: DK72690TB Material: ABS, metal Rated Voltage: 72V Bus Current: 300A 400A Phase Current: 690A Speed: 150km/h (The specific speed needs to be combined with vehicle weight and wind resistance) Maximum Input Current: 300A±6A Under Voltage Guard Value: 0.875 x VCC ± 1V Motor Control Mode: FOC Brake Mode: High Low level 12V Under Voltage Guard: 62-64V Over Voltage Guard: 91-93V Rated Power: 8640W Peak Power: 21600W Limited Value: 294-306A Operating Temperature: -20-60°C Application: Suitable for ≤10000W QS Motor Electric motorcycle mobility scooter. Package List: 1 x Controller 1 x Cover 1 x Wiring 5 x Screws Note: Professional installation is strongly recommended (with corresponding functional instructions on wiring). We also have an electronic version of the manual available.