I will sell this to anyone who is interested. I have quoted the text from the previous seller. I don't know the details, but thank you for your interest. It seems to be a beauty and health device that was used at home around the 1960s, but I don't know the details. When you turn on the switch, a considerable amount of red light comes on. The cord, outlet, and switch are gray, which is unusual. * After researching, it seems that red light with a wavelength of 650-1000 nanometers activates mitochondria, and research is currently being conducted to restore vision based on that hint. This may be based on a similar theory. Color: Red Area: Face