USB eye protection:

This product is made of carbon fiber body heating element, no burning, produces far infrared ray, good for health care, infrared heating body arising from 5 ? m to 15 ? m far infrared radiation ( This wavelength is necessary to human body and all living things) it is much easier to produce resonance on people's skin and tissue which will penetrate into the skin and subcutaneous tissue depths, resulting in the warm effect, improve blood circulation, expanding capillary, ...