Pixnor Magnetic Tourmaline Thermal Self-Heating Neck Pad Neck Support Brace Protector With dual thermoelectric and piezoelectric effect. Forms a resonant magnetic field resonates with the human body. Can effectively improve blood circulation, promote metabolism, and clear the meridians, enhance immunity. Applicable to bone hyperplasia, neck pain, joint pain and other symptoms of hyperthermia therapy. With elastic belt, safe comfortable to wear.