In modern society, people's awareness of benchmarking is gradually strengthened, the number of electric vehicles is increasing day by day, and life is developing in the direction of portability and intelligence. At this time, a new type of transportation-balance car appears in people's sight. Under the change of the center of gravity of the human body, the vehicle can be started, shifted, decelerated, turned, and stopped, however, this kind of power-assisted tool, which is comparable to electric vehicles, has a big problem. The product is bulky and not portable enough, and the shape is single. I have improved the product for the pain point of not being portable enough.