1. Strong performance: This product adopts high performance brushless DC motor, the motor efficiency is more than 87%, the service life is more than 500 hours. The utility model has the advantages of quiet, long service life and large torque. The output torque is above 6nm, which is equivalent to the output torque of 163CC engine. It can replace gasoline engine as a power source. 2. practical function: the whole machine shell adopts high tensile cold pressing plate, which is resistant to impact and deformation. The outer layer is electrophoretic + multilayer spray process, and its corrosion resistance is greatly improved. Salt spray test can pass 200 hours standard without red sleeve.