Far infrared ray is different from other electromagnetic wave, such as UV, X-ray, near infrared ray, and Gamma ray that other would result in ionization effect of the electrons on the protons; the other hand, far infrared ray has no such effect. It is also different from the low frequency electromagnetic wave (60Hz) emitted by home appliances. The low frequency electromagnetic wave generates electronic ionization, and penetrates the wall to change the electric current of the human body. It is suspected as a cause of cancer by doctors.

NEF-TECH light wave energy is different. It has longer wavelength, lower energy, and uses its own energy to feedback. It does not irritate the skin, change the skin color, or need power or heating device. Therefore, it has no problem of power leakage or high temperature that makes the skin dry or even burn. It is a gentle and excellent heating source with high safety.

The Gama radiation quantity after the SGS examination in the environment background value margin for safety, does not have the radiation hazard the worry.