☞[Mechanical power, no power supply required]:The centrifugal force generated by the interaction between the rotation of the wrist and the internal autobiographical core maintains the high-speed rotation of the core
☞[Rugged ball]: Zinc coating plating core, weight is moderately stable, uncomfortable, beautiful and durable, quality is guaranteed
☞[Controllable rotation frequency, more decompression]: The faster the wrist rotates, the stronger the impact force, and vice versa, the internal self-inspired strip structure is optimized, running smoother, lower noise, and playing more smoothly
