... , such as feet, leg, hands, arm, face, and back, for about 10~30minute.6. Reduce the symptom of lumbago, rheumatoid arthritis, neck ... , and sport, switching on this product for 5 minute, use it to rub the thews for 10~30 minute.8. preventing chilblain of ... winter, switching on this product for 5 minute, and rub the parts that was chilblain last year for 10~30 minute each day.