Usabestdeal® Force Ball /Power Ball/ Wrist Ball with Speed Counter and Led Light- Forearm Exerciser，including One Lanyard. Good for Fingers, Wrists, Hands, Forearms, Shoulders and Relevant Joint. (red)

Description

Product Description: Package weight: 12.5 Package size: 10.5*8.5*8 cm Max Speed: 12,000 R.P.M This wrist ball doesn't need battery, it is powered by rotating the wrist .The faster you rotate, the harder your muscles exercise, and the faster the wrist ball rotating. all you need to do is to increase the speed by making a rotational wrist movement with the ball . The speed of rotation can reach up to 12,000R.P.M. Which is popular in the world these years. Warm tips: If you have any questions with the items, please feel free to contact us by email. Our customer service will solve the problem for you as soon as possible.