<p><strong>Tratac Active Ball</strong> is a fast recharging portable equipment that allows you to apply pressure to treat muscle dysfunction. And this is efficiently designed for self-myofascial release & deep tissue massage.</p> <p>It is a versatile exercise product that can be used in the gym, the home or rehabilitation center. Advantages of Silicon material</p> <p> </p> <p>- High temperature stability - Resistance to aging & chemical assault </p> <p>- High thermal insulation </p> <p>- More durable than rubbers or elastomers Functions of the button </p> <p>- Press once : Shows battery remains - Press one more time : Vibration starts </p> <p>- Press again to change vibration intensity/level - Hold 2-3 seconds to turn off</p>