The characteristics of the photochromic mirror are introduced:

1. **Automatic adjustment:** The photochromic mirror is made of special materials, which can automatically adjust the color depth of the lens according to the light intensity, so as to adapt to the light changes in different environments.

2. **UV Protection:** The photochromic mirror not only adjusts the light, but also has a UV protection function, which can filter out harmful UV radiation and protect the eyes from UV damage.

3. **Multifunctional:** The photochromic mirror is suitable for various indoor and outdoor environments, without frequent replacement of lenses, and can provide a comfortable visual experience under different light conditions.

4. **Clear vision:** As the light changes, the photochromic mirror can adjust the lens color, reduce glare and scattering, and improve the clarity of vision.

5. **Convenient and practical:** No need for manual operation, the photochromic mirror can automatically adapt to light changes, bringing users a convenient experience.

6. **Anti-eye fatigue:** The automatic adjustment function of the photochromic mirror helps to reduce eye fatigue caused by long-term eye use and provide a more comfortable eye environment.

7. **Fashionable appearance:** The photochromic mirror not only has practical functions, but also has a variety of fashionable styles to choose from, becoming a part of fashionable life.

8. **Long-lasting and durable:** The self-adjusting function of the photochromic mirror is not affected by time and can maintain stable performance for a long time.

Overall, photochromic mirrors are a smart eyewear option that automatically adjusts color shades in response to changes in light, providing visual comfort and protection, while also being attractive in terms of fashion and practicality.