Characteristics:

There are three frame references available, all lenses have UV-400 eye protection (100% UV protection). They have adjustable and non-slip nose pads, they also have a wind deflector to generate less resistance when walking. The glasses can adjust the light transmission automatically by changing the color of the lens, so that the human eye can adapt to the change of ambient light and reduce visual fatigue. Come with PC frame for installation of prescription lenses. They have a polycarbonate lens with high flexibility, toughness and impact resistance. High definition blue light, anti-radiation, anti-ultraviolet, blocking harmful light below 400UV. Soft and comfortable rubber temples provide a pleasant feeling without putting pressure on your ears.

Note:
Operating time x color change: in winter- 1 minute; in summer-40 seconds.
Speed ​​depends on sunlight and UV intensity!
The rate of fading is related to the intensity of ultraviolet light and temperature.

(If the UV intensity and temperature are low, the fading speed will become slower.)