It is the great fitness and relaxing item:you can exercise your hands,wrists and complete arm with it,it glows when the ball is running,it is particularly shiny at night.So you can get a lot of fun from the exercise at the same time
No any batteries or chemical matters inside.It is the magic physical phenomenon to make the ball glitter.
Through effective exercise with the Wrist Ball,you can improve your muscle condition,grab power.Further you can use it as a relaxing item,while you rotate it slowly.
It is suitable for every age,if young or old,everybody can take advantage of the exercise-effect(strengthening of wrists,complete arms,grab power,impulse of blood circulation.)
Power ball
