Metech THz CA terahertz devices Combining terahertz technology + quantum technology + graphene technology, the THz wave able to penetrate 20-30 cm into the human body, and begin to activate dormant cells, stimulate cells, relax tendons, heat up bone merrow and activate collaterals. This will brings in the effects of Beauty care, relieve pain, remove dampness, cold and sore from our body. Easily help you return to a healthy, pain-free lifestyle.