FUNCTION: 1.Ingenious shape ,The pad for easy holding. 2.Light weight for convenient use . 3.Three changeable massage heads for different position and powerful massage. 4.Eliminate the fatigue caused by fierce sports and relax the muscle . 5.The spherical massage head is convenient for various parts of the back . 6.Heat treatment by the long-distance infrared ray. 7.Lightweight and handy artistic model . 8.Buyers designs and OEM/ODM orders are welcome, ONE YEAR GUARRANTEE .