Siet Wrist Trainer Ball Auto-Start Excerises arm Strengthener Essential Gyroscopic Wrist and Forearm Exerciser Wrist Ball for Stronger Muscle and Bones Workout

Wrist training balls are the healthiest way to treat arthritis and tendonitis. You can exercise your hands, wrists and forearms in just 5 minutes a day.
It can act on your grip strength, forearm and blood flow. Whether you are a white-collar worker, student, musician, athlete or e-sports player, you can use it to exercise your wrist anytime, anywhere.
Suitable for the crowd:
Ball sports, darts, rock climbing and other sports enthusiasts who need wrist strength; workers or learners who play piano, calligraphy, painting and computer typing; sedentary, lack of exercise and white-collar workers who respond to sub-health conditions.

specification:
Material: ABS + aluminum alloy
Color: white
Dimensions: .7.3 x6.2 cm
Weight: 300g

The package includes:
1 wrist ball.

note:
1. Before use, please make sure to fasten the sling.
2. Do not add any liquids, including water and oil.
3. During high-speed operation, do not touch the inner ball.

Good for Health：This power wrist ball not only increases strength in fingers, wrists, hands, forearms, biceps, triceps, ligament and shoulders, but also be a very effective tool release soothe wrist pain, numb hands and damaged limbs, or help reduce the inflammation caused by arthritis. Also be beneficial in promoting co-ordination and blood circulation
LED Flash Add Fun to Exercise ：With the novel design of LED lights, you can see how fast the rotation speed is. When rotating, the LED lights up. The faster the rotation, the brighter the LED light. LED lights is not powered by batteries, powered by rotating the wrist. Now rehabilitates sore muscles, kill the time and add fun!
More Safe and Eco-friendly：The silicone grip non-toxic, hypoallergenic, and it can be contacted your skin directly. Steel axis, not easy to deform and break. The unit did not have any weird vibration to it. Also having the silicone grip section helps with the gyro ball not coming loose from your hand
Easy to Use：Simple to start with a pull-string. All you need do is to increase the speed by making a rotational wrist movement and to keep in sync with the spinning of the ball. It keeps going as long as you keep your wrist moving until you let it stop, no need to worry about it will stop when you exercise
Suitable for Sports Training：Highly beneficial grip strength trainer for golf, tennis, climbing, cycling, basketball, cricket, martial arts and with improved playing performance for pianists, drummers and guitarists. Ideal wrist trainer for white-collar workers, athletes, guitarists, pianists, drummers and more