Product Description
Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles
Package Quantity: 1pcs
How to start your new wrist ball:
1: Take the gyro ball in your hands with the rotating core facing up and then use both of you thumbs to turn the rotator again and again ,up to the corresponding elastic core position along with the arrow direction.
: Hold the wrist ball tightly and then release yours thumbs off the rotator immediately, the rotator will be running at the speed of 1500 to 3000 rpm. At the same time ,turn your palm down slowly rotating your wrist to get the power to maintain the existing gyro ball or higher than the starting speed.