Hot & Cold Back Massager

*Icing: can be placed in the refrigerator and chilled and then iced.
*Hot compress: Place in hot water at 50 degrees Celsius for about
  three to five minutes.
  [*Depending on the temperature that each person accepts.]
*This product is designed in the shape of hook.
*It is mainly used to hold the handle with both hands,and the ball rolls
  to massage the back,shoulders,and neck.
*It can also be massaged to the difficult position.
*Use it during Muscle swelling and Strength.
*Sore cervical and lumbar spine,and tight muscles to relieved
  pressure/cool feeling poor posture,muscle stiffness to be soothed
  fascia and prevented muscle sticking.