Self-starting Muscle Relax Powerball Wrist Power Hand Ball Metal With LED Light

Overview: 1.Multifunctional design can be used in the office, gym, or home, and can also be a good pressure reducer as well as a good toy and arm muscle exercising. 2.Smart gravity sensor can be used to feel the centrifugal force and to strengthen your limb's coordination or rehabilitation training. 3.Simple operation can be powered on quickly by rotating your wrist to make fast speed. 4.Compact size can be put in your bags to do outdoor activities. 5.High-quality zinc alloy and plastic materials, durable and non-toxic. 6.Stylish look with a quiet sound can be a great gift. 7.Computer calibration ball heart balance, high stability, and low noise. 8.Self start(Inside have spring can start by self after a pull). 9.Special durable plastic materials. Notes： 1. Avoid falling. Wrestling can cause shaft bending, vibration, abnormal sounds, and cannot be repaired. 2. Please do not shake the wrist force ball or press the center of the ball hard