Generally, the rotation of the hula hoop counter is the next turn, and a gear drives the last turn to turn one grid. If it does not rotate, it will always display 0, indicating that the mechanical counter does not carry forward and needs to be checked, repaired or replaced with a new one.

Hula hoop, also known as fitness circle, was popular in Europe, America, Australia, Japan and other countries in the 1950s. It can obtain better movement and development of waist and abdomen muscles, hip muscles and leg muscles, and can effectively improve the flexibility and flexibility of waist, hip and knee joints. Besides being a general toy, it is often used in competitions, acrobatic performances, or as a weight loss device.