Rated parameter of 36V/250W; built-in laboratory-level high-precision torque + cadence sensor; equipped with FOC control components with automotive-grade hardware and software platforms. Based on an independent visual debugging platform; relying on a large amount of complex road test data, the high-efficiency, low-noise, low-jitter, and low-latency adjustment status has been achieved, realizing sufficient power, stability and efficiency, smooth riding, and smooth exit effect. Weighs 3.3kg, the maximum power greater than 500W, the maximum torque exceeds 80Nm; the maximum efficiency of 80%; the no-load noise less than 55dB; protection level of IP65. This model is suitable for wheel diameters ranging from 20 inches to 700C, and can be widely used in city, travel, and road models.