Wrist Power Gyro Ball, Hand Forearm Strengthener, Wrist Trainer, Auto-Start Colorful Lighting

【GOOD FOR HEALTH】Using wrist gyro balls for exercise can alleviate problems such as wrist soreness and finger stiffness caused by prolonged fixed hand movements, and can also promote blood circulation. An interesting palm wrist gyro ball that can be used as a stress relieving toy, played at any time, and can also exercise arm muscles.

【EASY TO USE】Newly upgraded products that automatically starts without the need for a rope, making it easy to use. Simply rotate the core ball to start.

【BATTERY FREE DESIGN】Precision mechanical design, no battery required to provide power. The interaction between the rotation of the wrist and the internal ball core generates centrifugal force, which can maintain high-speed rotation. The faster the speed, the greater the force generated.