Dynamic:

There is no any battery or electricity inside the device, It is application by centrifugal force & inertia like a gyroscope. It is powered by rotating the wrist. The faster we rotate the ball, the stronger the dynamic and torsion is produced. The speed of rotation can reach over *2,**0 RPM.

Function:

1.Perfect exercise gadget for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.

2. Increases strength in fingers, wrists, hands, forearms, biceps, triceps, ligament and shoulders

3. Great benefit and avoid the ligament injuries who are the typists, musicians, guitarists, pianists, drummers,

4. It can make the hurt hand return to original condition by degrees and rehabilitates sore muscles and joints.

5. it can make the circulation of the blood better in a short time,

Merits:

1) It is a small ball, which can make people achieve sporting effects in a very short time.

2) Almost everyone can play it, no matter the old, adults, orteenagers.

3) No time or location limits. It can be used at any time and in any place while chatting, watching TV, going outing and mountain climbing, and taking a bus.

Features:

1) The balance of the rotor has been corrected by computer, so the ball has very excellent stability.

2) There is a circle of silicone rubber on the surface of the ball. That can prevent the ball from sliding down to the ground, and the feeling of grasping is also better.

3) The plastic material is especially durable

4) The axle is made of steel, not iron. It is not easy to be broken