1.Self-heating pad designed for the wrist. 2.Made up of permanent magnets the bio-composite heat-chip Moxibustion consists of tourmaline nano-functional ceramic powder and a special heat sensitive materials. 3.With dual thermoelectric and piezoelectric effect. 4.Forms a resonant magnetic field resonates with the human body. 5.Can effectively improve blood circulation promote metabolism and clear the meridians enhance immunity. 6.Applicable to bone hyperplasia wrist pain joint pain and other symptoms of hyperthermia therapy. 7.Easy to use discreet and can be used anywhere any time. 8.Wipe Tourmaline cloth part and then fasten it to the sore. 9.Safe & comfortable to wear. 10.With Velcro closure easy to take on/off. 11.Generally 30 minutes later it will work. 12. 1~2 hours per day is recommended.