controller High torque output: amplified torque through gear reduction suitable for steep slopes mountains and other complex terrain Modularized design: motor controller and sensor are highly integrated and the parts can be replaced separately during maintenance. Compatible with a wide range of vehicles: can match vehicles with different wheel diameters and tire types. High stability: The motor is located in the middle of the vehicle to improve driving stability especially suitable for high-speed riding or off-road scenarios. Wide applicability：It is suitable for DIY electric scooters electric bikes E-Motorcycle Moped etc.