Auto-Start Wrist Power Gyroscopic Ball,Wrist Strengthener and Forearm Exerciser for Stronger Arm Fingers Wrist Bones and Muscle

How to get it starting? Step1: Hold it with the arrowed rotator facing up. Step2: Toggle the ball along the double direction arrow to the max resistance,then release it,fast enough to have the ball turn the LED on. Step3: Turn your plam facing down, and slowly start to rotate, you will feel that it is scratching against the inside of the wrist ball. Step4: Keep rotating with wrist then the ball will spin faster. The faster you spin it, the heavier the resistance will be. Step5: Once you feel it spinning fast enough, stop your rotate, you could feel it oscillating right in your palm. Warm note: Please don't try to use your hands to stop the exposed center rotor part as it will hurt your skin when it spins at high speed.