What level is Uber rocket?

Youbei rocket belongs to the upper middle class. According to the information of Youbei official website, small rocket quantity, safety+diversified core elements of riding, material safety, high carbon steel material, triangular structure frame, high stability, easy to resist various impacts, safe paint, mild and non-irritating to prevent skin allergies, durable and corrosion-resistant, and patented small brake handle can solve the risk factors such as children's small hands not reaching the brake handle and braking in time.