The world's first portable massage stick with vibrating and heating technology. It uses Far Infrared Ray technology for its heating function. Far-Infrared Rays are waves of energy, totally invisible to the naked eye, which penetrate the surface of the skin where they gently elevate the body’s surface temperature to 107.6F/42C and above, whilst positively activating the body systems and functions. Read
here for more benefits about FIR technology.