Wrist Gyro Ball, Wrist Booster and ForearmExerciser for Bones and Muscles of The ArmsAnd Wrists with LED Lights.
Brand: XIYUAN
Wrist wrist ball

Extend your arm, the bare part is facing up, grab the remaining rope and pull it up quickly. If the operation is correct, the ball will start to rotate. Hold the wrist ball with your favorite hand and start rotating your hand and wrist while trying to keep your arm steady to help speed up the gyroscope until the desired speed is reached. Continue to use until it is completed.

It's fun, it's suitable for hands, wrists, shoulders, forearms, biceps, warm-up exercises, then climbing, golf, basketball, etc.
Also, if you use your computer for a long time or play the piano, you can play for 15 to 20 minutes a day, and you will feel that your hands are not so painful.

Powerball ball toy hand grip enhancer; hand exerciser; relieve stress - anti-stress and anxiety, with LED lights, children, teenagers, students and adults
Make your arms glow again: strengthen your fingers, wrists, hands, forearms, shoulders and biceps, and also help promote coordination and blood circulation.
Good for health: exercise fingers, wrists, hands, forearms, shoulders, strengthen arm strength, restore muscle and joint pain, reduce arthritis, carpal tunnel syndrome, inflammation caused by RSI or sputum inflammation. Ideal for athletes, guitarists, pianists, drummers and white-collar workers.
Eye-catching design: The wrist gyro ball with the new LED light design shows how fast the rotation speed is. When rotating, the LED lights up. The faster the rotation speed, the brighter the LED light, as long as it rotates, it will remain lit, combining sports, entertainment and fitness. The indicator will only illuminate when your speed is fast enough.
Easy to use: easy to use. Impact resistant construction with military grade plastic housing. Even more exciting is that the fitness ball will light up when it spins! And the LED lights are not powered by the battery. No battery required. No need to worry about running out of power. As long as it is rotated, it will remain lit.
Customer Guarantee: Our goal is to provide you with quality products. Our goal is to make you satisfied with the purchase. However, if you are not completely satisfied, please contact us and we will give you a 100% refund within 90 days of purchase.