Enhanced Motor Control: Provide a significant boost in your motor’s speed and power, providing optimal performance that matches well with for QS Hub and for QS Mid drive motors. Stable Sine Management: The sine controller could provide high stability without unnecessary fluctuations, creating a perfectly harmonious effect for a seamless power transition. Battery Protection and Enhanced Lifespan: Not only does it protect and extend the life of your battery, also boosts the driving distance, making your rides longer without frequent charging. Self Learning: With its self learning capacity and professional craftsmanship, this controller has a high reliability and unique design. Showcasing excellent commonality, it amplifies your riding experience. High Durability: Crafted from premium material, this sine controller can withstand high temperatures and corrosion, ensuring stability and longevity under continuous usage. Equal to or less than 1500W (this value is a normal matching value, if you do not pursue torque and top speed, you can float up a power range). Fitment: Fits for Electric Motorcycle Electric Scooter Brushless DC Driver. 1 x Wiring Cable. Sine controller, brushless DC controller with self learning function. Matches well with for QS motors, and if you want to match with new brand motors, some parameters need to be tested by yourself. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.