Parallel Halo Power Wrist Ball AUTO Start Metal Shell Gyroscope Ball with Colorful Lights Weighted Wrist and Forearm Exerciser Arm Strengthener for Strengthening Muscle and Bones

How to Start it 1. Pull off the plastic insulation before use. 2. Toggle the ball along the double direction arrow to the max resistance,then release it 3. Turn your plam facing down, and slowly start...