● Precautions before purchasing ●
* As a result of inspection at our shop, there is no problem in use, but it is judged that it cannot be sold at a regular price such as small scratches and chips.. Please order after you fully understand the contents..

* Please note that it is a translated ants product, so we cannot accept refunds and exchanges for any reason..

■ size
34 x 19 x 5 mm (size is a guide. Because it is polished by hand, it is different one by one)

■ What is Terahertz?
The terahertz wave, which vibrates about 1 trillion times per second, has an intermediate characteristic between radio waves and light.. It is a wavelength that is easy to affect the exercise of the terahertz wave undercoles, and will give you a mysterious experience and surprising effect on the human body, plants, and substances.

Recent research has proved the effects of Terahertz. Terahertz waves can transmit various substances such as paper, wood, and plastic, and are expected to be applied in the medical field.

In addition, it is said that terahertz waves overlap with far -infrared rays and wavelengths, and have the effect of self -fever. It is said that the effects of the human body are sleep disorders, stiffness, and improvement of cold.