Self-heating waist protection is a high-tech product with tourmaline as the core and nano-biological functional materials. Self-heating waist protection has the dual functions of thermoelectric and piezoelectric, and forms * * * vibration * * sound with human magnetic field. And through the human body's own energy, it constantly releases heat energy, negative ions and far infrared to produce deep thermal effects. It can effectively improve blood circulation, promote metabolism, dredge meridians, dispel wind and dampness, relieve pain and dispel cold, and enhance the body's disease resistance. Self-heating waist protection principle: Self-heating waist protection needs no power supply, and it can automatically emit and absorb the energy of nature and human body at room temperature, and convert it into biological energy of human body, thus activating cells, promoting metabolism, fully improving human microcirculation, and effectively activating the molecular movement of cellular substances, that is, cell activation.