Powerball, Gyroball, Wristball

1. powerball with counter and light ,wrist ball with speedmeter, 2. No battery required,Self-contained mechanism dynamical balanced gyro ball. 3. Increase your wrist strength while having fun. Wrist and finger grasp strength.Forearms muscles strong.The vibration of your arm makes blood circulation well. 4. The speed will reach 12,000 R. P. M. If you are skillful. Sound will lead you to a new&explode experience. 5. It is suitable for adult and teenager. This is ball with automatic flash light, very beautifull and interesting. 6.Product are available various color in red, blue, grey, transparent, yellow and others