Exercise device for hands and doll. Reaches 15,000 revolutions per minute and exerts a lateral force of 18 Kg. Also incorporates LEDs whose intensity increases as you increase the number of revolutions of the PowerBall. You do not need batteries the PowerBall generates its own energy! Give me a minute and I will give you a strong hand!
The original powerball is a training device of high efficiency using which You will be able to train in a simple and highly effective in their fingers, wrists, forearms and arms and even the shoulders.
The powerball will increase your physical condition, the grip strength of your hand and its coordination capacity that is ideal for activities sports