Bluetooth Wrist Ball Self-Starting Silent Arm Strength Wrist Exercise Grip Centrifugal Fitness Metal Strength Training…

Product outer ring: ABS Suitable age: over 10 years old Product core: zinc alloy Product size: diameter 70MM Product use: exercise wrist strength, relax decompression, relieve fatigue

The wrist ball uses a gyroscope and similar celestial mechanics motion principles to generate a strong inertial centrifugal force during operation, so that the arm and wrist can feel the best movement state autonomously
It can effectively relieve the pain of muscle and bone pain caused by long-term use of wrists and arms, tenosynovitis, etc., and can also help fitness enthusiasts to conduct targeted strength training.
The built-in automatic elastic device can be easily activated and controlled by one push and one release, increasing the fun of entertainment
The faster the wrist rotates, the stronger the impact force, and the weaker the converse.
As the speed of the core speeds up, the color of the internal light bar will also be more colorful, making exercise more interestin