Feature: 1. 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. 2. Stable Sine Wave Management: The sine wave controller could provide high stability without unnecessary fluctuations, creating a perfectly harmonious effect for a seamless power transition. 3. 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. 4. 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. 5. High Durability: Crafted from premium material, this sine wave controller can withstand high temperatures and corrosion, ensuring stability and longevity under continuous usage. Specification: Item Type: Brushless DC Controller Material: ABS Model: ND72200 Voltage: 72V Phase Current: 200A Bus Current: 55A Number of Tubes: 12 Waterproof Rating: IP67 Sensor Type: Hall Sensor Applicable Motor Power: Equal to or less than 1500W (this value is a normal matching value, if you do not pursue torsion and top speed, you can float up a power range) Fitment: Fits for Electric Motorcycle Electric Scooter Brushless DC Driver. Package List: 1 x Brushless DC Controller1 x Wiring Cable7 x Screw Note: Sine wave 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.