Product: Summermax Auto-Star Wrist Power Gyroscopic Ball,Wrist Strengthener and Forearm Exerciser for Stronger Arm Fingers Wrist Bones and Muscle (Auto Blue)
Brand: summermax
Color: Auto Blue
Summermax Wrist Power Wrist ball-Auto type 
 
 Please holding the ball in your hand, make sure the open part of the gyroscope faces towards you. Gently spin the inner part of the gyroscope until you see arrows that indicate the direction to spin. 
 
 With your arm extended and the exposed part facing toward the hard surface, take the gyroscope and quickly run the inner part of the gyroscope on the surface and have it spin in the direction that the arrows indicate. Faster motions to initiate the spin tends to yield better results. Think of striking a match as you initiate the spin. A quick flick helps the ball gain enough momentum to allow you to take control and get it going faster. As always, be sure to do so safely. If done properly the ball will begin spinning. 
 
 The first few times may be hard, but like riding a bike once you figure out how it works, it gets easier and easier to do. It will feel weird at first but try and pay attention to the subtle movements that the gyroscope gives to know how fast to rotate your hand and wrist. If it stops spinning, restart. 
 
 Oftentimes it helps to imagine there is a center point on the back of your hand. Make a circle around the center point when you hold the Summermax Power Wrist Ball. The motion of your hand rotating the Power Wrist Ball is similar to swirling Ice cubes in a glass or swirling wine in a glass. It’s not about how fast you rotate your arm, but rather figuring out how fast to rotate to help get the gyroscope to speed up. It usually starts with slow rotations of your hand, and then leads up to faster rotations. You will begin to know when your going fast enough when its lights start to flash. 
 
 Rotating too fast at first can often be counterproductive and cause the ball to slow down or stop. Try to synchronize the rotation of your wrist to the momentum and timing of the rotor’s gyration. The faster the rotor spins.
Make Arm Great Again. Strengthen fingers, wrists, hands, forearms, shoulders and bicep etc., and also be beneficial in promoting co-ordination and blood circulation.
This certainly requires some fine motor skills in order to use. The dominant hand/arm was easily able to keep the gyro ball going, that it will help refine your fine motor skills in that non-dominant hand/arm.
Small, compact and transportable, you can take anywhere. Simple to start with a pull-string.And the ball with flashing LED ，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.
The unit did not have any weird vibration to it. Also having the silicone grip section is very nice as it helps with the gyro ball not coming loose from your hand. You can attach it to wrist strap, if you are really concerned about the gyro ball flying away.
100% with 30days Satisfaction Money Back Guarantee and 90 days quality warranty

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